APA aipamena

Brown,Lester R. (1989). State of the world. PHI.

Chicago Style aipamena

Brown,Lester R. State of the World. New Delhi: PHI, 1989.

MLA aipamena

Brown,Lester R. State of the World. PHI, 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.