APA aipamena

World Book, I. (2011). The World Book encyclopedia. Chicago: World Book.

Chicago Style aipamena

World Book, Inc. The World Book Encyclopedia. Chicago: World Book, 2011.

MLA aipamena

World Book, Inc. The World Book Encyclopedia. Chicago: World Book, 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.