Knapp, N.F. (2003). "In Defense of Harry Potter: An Apologia"(PDF). School Libraries Worldwide. 9 (1). International Association of School Librarianship: 78–91. Archived from the original(PDF) on 9 March 2011. Retrieved 14 May 2009.
Rowling, J.K. (15 March 2004). "Progress on Book Six". J.K. Rowling Official Site. Archived from the original on 26 December 2010. Retrieved 21 March 2011.
Flood, Alison (17 June 2008). "Potter tops 400 million sales". TheBookseller.com. Archived from the original on 18 January 2012. Retrieved 12 September 2008.
"Speed-reading after lights out". The Guardian. London: Guardian News and Media Limited. 19 July 2000. Archived from the original on 31 December 2013. Retrieved 27 September 2008.
Knapp, N.F. (2003). "In Defense of Harry Potter: An Apologia"(PDF). School Libraries Worldwide. 9 (1). International Association of School Librarianship: 78–91. Archived from the original(PDF) on 9 March 2011. Retrieved 14 May 2009.
"Speed-reading after lights out". The Guardian. London: Guardian News and Media Limited. 19 July 2000. Archived from the original on 31 December 2013. Retrieved 27 September 2008.
Rowling, J.K. (15 March 2004). "Progress on Book Six". J.K. Rowling Official Site. Archived from the original on 26 December 2010. Retrieved 21 March 2011.
Flood, Alison (17 June 2008). "Potter tops 400 million sales". TheBookseller.com. Archived from the original on 18 January 2012. Retrieved 12 September 2008.