APA (7th ed.) Zitazioa
Hudson, A. (2006). The armillary sphere: Poems. Ohio University Press.
Chicago Style (17th ed.) Zitazioa
Hudson, Ann. The Armillary Sphere: Poems. Athens: Ohio University Press, 2006.
MLA (9th ed.) Zitazioa
Hudson, Ann. The Armillary Sphere: Poems. Ohio University Press, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.