APA aipamena

(2004). World Book: Version 8.00. Chicago, Illinois: World Book.

Chicago Style aipamena

World Book: Version 8.00. Chicago, Illinois: World Book, 2004.

MLA aipamena

World Book: Version 8.00. Chicago, Illinois: World Book, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.