APA aipamena

Freud, S. (1990). Origins of religion. Penguin Books.

Chicago Style aipamena

Freud, Sigmund. Origins of Religion. England: Penguin Books, 1990.

MLA aipamena

Freud, Sigmund. Origins of Religion. Penguin Books, 1990.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.