APA (7th ed.) Zitazioa
Green, J. (2017). Turtles all the way down. Penguin Books.
Chicago Style (17th ed.) Zitazioa
Green, John. Turtles All the Way Down. London: Penguin Books, 2017.
MLA (9th ed.) Zitazioa
Green, John. Turtles All the Way Down. Penguin Books, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.