APA (7th ed.) Zitazioa

Morgan. Harborless. Wayne State University Press.

Chicago Style (17th ed.) Zitazioa

Morgan. Harborless. Wayne State University Press.

MLA (9th ed.) Zitazioa

Morgan. Harborless. Wayne State University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.