APA aipamena

Lerdorf, R. (2002). Programming PHP. O'Reilly.

Chicago Style aipamena

Lerdorf, Rasmus. Programming PHP. O'Reilly, 2002.

MLA aipamena

Lerdorf, Rasmus. Programming PHP. O'Reilly, 2002.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.