APA (7th ed.) Zitazioa
Whittaker, D. J. (1997). United Nations in the contemporary world. Routledge.
Chicago Style (17th ed.) Zitazioa
Whittaker, David J. United Nations in the Contemporary World. London ; New York: Routledge, 1997.
MLA (9th ed.) Zitazioa
Whittaker, David J. United Nations in the Contemporary World. Routledge, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.