APA (7th ed.) Zitazioa

World Book, I. (1999). The world book encyclopedia: N-o. World Book.

Chicago Style (17th ed.) Zitazioa

World Book, Inc. The World Book Encyclopedia: N-o. Chicago: World Book, 1999.

MLA (9th ed.) Zitazioa

World Book, Inc. The World Book Encyclopedia: N-o. World Book, 1999.