APA aipamena

Grolier International. (1987). Grolier Academic Encyclopedia. Grolier International,Academic American.

Chicago Style aipamena

Grolier International. Grolier Academic Encyclopedia. USA: Grolier International,Academic American, 1987.

MLA aipamena

Grolier International. Grolier Academic Encyclopedia. Grolier International,Academic American, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.