THE WORLD BOOK.. (2007). The world book S-Sn volume 17. World Book.
Chicago Style aipamenaTHE WORLD BOOK.. The World Book S-Sn Volume 17. Chicago: World Book, 2007.
MLA aipamenaTHE WORLD BOOK.. The World Book S-Sn Volume 17. World Book, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.