APA aipamena

World Book, Inc. (1997). The World Book encyclopedia. World Book International.

Chicago Style aipamena

World Book, Inc. The World Book Encyclopedia. London ; Sydney: World Book International, 1997.

MLA aipamena

World Book, Inc. The World Book Encyclopedia. World Book International, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.