Memento, c2001: credits (Christopher Nolan)

Internet Movie Database, Jan. 9, 2002: (Christopher Nolan; b. Christopher Johnathan James Nolan, July 30, 1970, London; sometimes credited as Christopher E. Nolan; film director, writer, editor, producer, cinematographer)

Harper, Benjamin. Batman begins, 2005: t.p. (Christopher Nolan)

Internet Movie Database WWW site, May 6, 2016: (Christopher Nolan, writer, producer, director ; b. Christopher Johnathan James Nolan, July 30, 1970 in London, England, UK )

IMDb, January 5, 2020: (Christopher Nolan, writer, producer, director ; b. July 30, 1970 in London, England, UK)