APA (7th ed.) Zitazioa
Pi�n�on, R. (2002). Biology of human reproduction. University Science Books.
Chicago Style (17th ed.) Zitazioa
Pi�n�on, Ram�on. Biology of Human Reproduction. Sausalito, Calif.: University Science Books, 2002.
MLA (9th ed.) Zitazioa
Pi�n�on, Ram�on. Biology of Human Reproduction. University Science Books, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.