Harris, Mark (December 28, 1990). "1. Bart Simpson". Entertainment Weekly. Archived from the original on November 3, 2014. Retrieved September 15, 2008.
Walk, Gary Eng (November 5, 2007). "Work of Bart". Entertainment Weekly. Archived from the original on October 17, 2008. Retrieved October 29, 2008.
Fonseca, Nicholas (November 15, 2001). "Cereal Numbers". Entertainment Weekly. Archived from the original on October 12, 2013. Retrieved October 28, 2008.
Kuipers, Dean (April 15, 2004). "3rd Degree: Harry Shearer". Los Angeles: City Beat. Archived from the original on June 5, 2008. Retrieved September 21, 2008.
Kuipers, Dean (April 15, 2004). "3rd Degree: Harry Shearer". Los Angeles: City Beat. Archived from the original on June 5, 2008. Retrieved September 21, 2008.
Harris, Mark (December 28, 1990). "1. Bart Simpson". Entertainment Weekly. Archived from the original on November 3, 2014. Retrieved September 15, 2008.
Fonseca, Nicholas (November 15, 2001). "Cereal Numbers". Entertainment Weekly. Archived from the original on October 12, 2013. Retrieved October 28, 2008.