APA (7th ed.) Zitazioa
Foot, S. (2011). Æthelstan: The first king of England. Yale University Press.
Chicago Style (17th ed.) Zitazioa
Foot, Sarah. Æthelstan: The First King of England. New Haven: Yale University Press, 2011.
MLA (9th ed.) Zitazioa
Foot, Sarah. Æthelstan: The First King of England. Yale University Press, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.