APA (7th ed.) Zitazioa

Sherman. That Sheep May Safely Graze. Purdue University Press.

Chicago Style (17th ed.) Zitazioa

Sherman. That Sheep May Safely Graze. Purdue University Press.

MLA (9th ed.) Zitazioa

Sherman. That Sheep May Safely Graze. Purdue University Press.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.