THE WORLD BOOK. (2007). The world encyclodia Q-R volume 16. World Book.
Chicago Style aipamenaTHE WORLD BOOK. The World Encyclodia Q-R Volume 16. Chicago: World Book, 2007.
MLA aipamenaTHE WORLD BOOK. The World Encyclodia Q-R Volume 16. World Book, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.