APA (7th ed.) Zitazioa
(2018). Understanding human sexuality. Willford Press.
Chicago Style (17th ed.) Zitazioa
Understanding Human Sexuality. New York: Willford Press, 2018.
MLA (9th ed.) Zitazioa
Understanding Human Sexuality. Willford Press, 2018.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.