APA aipamena

World Book, I. (2004). The World Book encyclopedia. Chicago, Illinois: World Book.

Chicago Style aipamena

World Book, Inc. The World Book Encyclopedia. Chicago, Illinois: World Book, 2004.

MLA aipamena

World Book, Inc. The World Book Encyclopedia. Chicago, Illinois: World Book, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.