APA (7th ed.) Zitazioa
Oliver, R. (1994). Africa since 1800 (4th ed.). Cambridge.
Chicago Style (17th ed.) Zitazioa
Oliver, Roland. Africa Since 1800. 4th ed. New York: Cambridge, 1994.
MLA (9th ed.) Zitazioa
Oliver, Roland. Africa Since 1800. 4th ed. Cambridge, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.