Jorge Cham (December 20, 2006), Taking the laptop with me, archived from the original on July 29, 2022, retrieved April 23, 2009; Jorge Cham (2008), Scooped!: The Third Piled Higher & Deeper Comic Strip Collection, Los Angeles, Calif.: Piled Higher & Deeper, LLC, p. 110, ISBN978-0-9721695-3-0
Jorge Cham (November 22, 1997), Dead Week, Piled Higher and Deeper, archived from the original on October 5, 2007, retrieved April 23, 2009)
Cecilia turned 25 in 2005: Jorge Cham, Birthday 2005, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved October 28, 2009; Cham, Scooped!, p. 12.
Cecilia went to her 10 year high school reunion in 2001: Jorge Cham (November 14, 2001), High School Reunion, Piled Higher and Deeper, archived from the original on September 24, 2011, retrieved October 28, 2009; Cham, Scooped!, p. 12.
Jorge Cham (November 23, 2000), The grad student of academia, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (June 6, 2005), Dress to repress, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 14.
Jorge Cham (May 8, 2006), Friday night, Piled Higher and Deeper, archived from the original on October 8, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 67.
Jorge Cham (May 18, 2006), Long distance, Piled Higher and Deeper, archived from the original on October 7, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 69.
Jorge Cham (March 30, 2007), Is this it?, Piled Higher and Deeper, archived from the original on October 7, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 130.
Jorge Cham (January 31, 2006), Faculty position, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 53.
Jorge Cham (February 5, 2006), Faculty position, Piled Higher and Deeper, archived from the original on October 9, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 53.
Jorge Cham (November 11, 1999), Go Cardinal!, Piled Higher and Deeper, archived from the original on July 29, 2022, retrieved November 26, 2015
Jorge Cham (December 8, 2003), Coming back to grad school, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (May 22, 1998), Slackenerny – going to Vegas, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (January 23, 2006), Paternity leave, Piled Higher and Deeper, archived from the original on October 11, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 51.
Jorge Cham (April 2, 2007), Now what?, Piled Higher and Deeper, archived from the original on October 13, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 131.
"Drama!". PHD Comics. Archived from the original on 2010-12-29. Retrieved 2010-07-04.
Jorge Cham (April 28, 2010), PHD Comics: Lost no more...?, Piled Higher and Deeper, archived from the original on December 29, 2010, retrieved May 15, 2010
"Tech support". PHD Comics. Archived from the original on 2010-12-29. Retrieved 2010-06-24.
Jorge Cham (June 29, 2009), Bridge, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved September 27, 2009
"Simpler". PHD Comics. Archived from the original on 2010-12-30. Retrieved 2010-06-24.
Jorge Cham (July 4, 2005), Cingradella, Piled Higher and Deeper, archived from the original on October 11, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 20.
Jorge Cham (October 19, 2001), Kids! (Part 4), Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
"PHD Comics: TL; DR". phdcomics.com. Archived from the original on October 29, 2019. Retrieved September 8, 2019.
The fact that his first name is Brian is reflected in Jorge Cham (June 20, 2001), Lil' sister, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009 and Jorge Cham (December 20, 2005), A Smithmas carol, Piled Higher and Deeper, archived from the original on October 7, 2011, retrieved April 23, 2009; Cham, Scooped!, p. 45.
Jorge Cham (August 2, 2006), Conference call, Piled Higher and Deeper, archived from the original on October 8, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 81.
Jorge Cham (November 24, 2010), Smith Circus, Piled Higher and Deeper, archived from the original on October 7, 2011, retrieved February 9, 2011
Jorge Cham (November 24, 2010), A Smithmas Carol, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
Jorge Cham (June 20, 2001), Lil' Sis (Part 5), Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
Jorge Cham (November 24, 2010), Smith Circus, Piled Higher and Deeper, archived from the original on July 15, 2011, retrieved February 9, 2011
Jorge Cham (December 8, 2005), A Smithmas carol, Piled Higher and Deeper, archived from the original on December 29, 2010, retrieved April 23, 2009; Cham, Scooped!, p. 43.
Jorge Cham (August 16, 2005), Author biographies, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 85.
Jorge Cham (December 20, 2006), Taking the laptop with me, archived from the original on July 29, 2022, retrieved April 23, 2009; Jorge Cham (2008), Scooped!: The Third Piled Higher & Deeper Comic Strip Collection, Los Angeles, Calif.: Piled Higher & Deeper, LLC, p. 110, ISBN978-0-9721695-3-0
Jorge Cham (November 22, 1997), Dead Week, Piled Higher and Deeper, archived from the original on October 5, 2007, retrieved April 23, 2009)
Cecilia turned 25 in 2005: Jorge Cham, Birthday 2005, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved October 28, 2009; Cham, Scooped!, p. 12.
Cecilia went to her 10 year high school reunion in 2001: Jorge Cham (November 14, 2001), High School Reunion, Piled Higher and Deeper, archived from the original on September 24, 2011, retrieved October 28, 2009; Cham, Scooped!, p. 12.
Jorge Cham (November 23, 2000), The grad student of academia, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (June 6, 2005), Dress to repress, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 14.
Jorge Cham (May 8, 2006), Friday night, Piled Higher and Deeper, archived from the original on October 8, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 67.
Jorge Cham (May 18, 2006), Long distance, Piled Higher and Deeper, archived from the original on October 7, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 69.
Jorge Cham (March 30, 2007), Is this it?, Piled Higher and Deeper, archived from the original on October 7, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 130.
Jorge Cham (January 31, 2006), Faculty position, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 53.
Jorge Cham (February 5, 2006), Faculty position, Piled Higher and Deeper, archived from the original on October 9, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 53.
Jorge Cham (November 11, 1999), Go Cardinal!, Piled Higher and Deeper, archived from the original on July 29, 2022, retrieved November 26, 2015
Jorge Cham (December 8, 2003), Coming back to grad school, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (May 22, 1998), Slackenerny – going to Vegas, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009
Jorge Cham (January 23, 2006), Paternity leave, Piled Higher and Deeper, archived from the original on October 11, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 51.
Jorge Cham (April 2, 2007), Now what?, Piled Higher and Deeper, archived from the original on October 13, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 131.
"Drama!". PHD Comics. Archived from the original on 2010-12-29. Retrieved 2010-07-04.
Jorge Cham (April 28, 2010), PHD Comics: Lost no more...?, Piled Higher and Deeper, archived from the original on December 29, 2010, retrieved May 15, 2010
"Tech support". PHD Comics. Archived from the original on 2010-12-29. Retrieved 2010-06-24.
Jorge Cham (June 29, 2009), Bridge, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved September 27, 2009
"Simpler". PHD Comics. Archived from the original on 2010-12-30. Retrieved 2010-06-24.
Jorge Cham (July 4, 2005), Cingradella, Piled Higher and Deeper, archived from the original on October 11, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 20.
Jorge Cham (October 19, 2001), Kids! (Part 4), Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
"PHD Comics: TL; DR". phdcomics.com. Archived from the original on October 29, 2019. Retrieved September 8, 2019.
The fact that his first name is Brian is reflected in Jorge Cham (June 20, 2001), Lil' sister, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved April 23, 2009 and Jorge Cham (December 20, 2005), A Smithmas carol, Piled Higher and Deeper, archived from the original on October 7, 2011, retrieved April 23, 2009; Cham, Scooped!, p. 45.
Jorge Cham (August 2, 2006), Conference call, Piled Higher and Deeper, archived from the original on October 8, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 81.
Jorge Cham (November 24, 2010), Smith Circus, Piled Higher and Deeper, archived from the original on October 7, 2011, retrieved February 9, 2011
Jorge Cham (November 24, 2010), A Smithmas Carol, Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
Jorge Cham (June 20, 2001), Lil' Sis (Part 5), Piled Higher and Deeper, archived from the original on December 30, 2010, retrieved February 9, 2011
Jorge Cham (November 24, 2010), Smith Circus, Piled Higher and Deeper, archived from the original on July 15, 2011, retrieved February 9, 2011
Jorge Cham (December 8, 2005), A Smithmas carol, Piled Higher and Deeper, archived from the original on December 29, 2010, retrieved April 23, 2009; Cham, Scooped!, p. 43.
Jorge Cham (August 16, 2005), Author biographies, Piled Higher and Deeper, archived from the original on October 4, 2007, retrieved April 23, 2009; Cham, Scooped!, p. 85.