APA (7th ed.) Zitazioa
White, R. (1990). Africa in focus: A physical, human and economi geography. Macmillan.
Chicago Style (17th ed.) Zitazioa
White, Richard. Africa in Focus: A Physical, Human and Economi Geography. London: Macmillan, 1990.
MLA (9th ed.) Zitazioa
White, Richard. Africa in Focus: A Physical, Human and Economi Geography. Macmillan, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.