APA (7th ed.) Citation

Post, K. (1968). The new States of West Africa (Rev. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Post, Ken. The New States of West Africa. Rev. ed. Harmondsworth: Penguin Books, 1968.

MLA (8th ed.) Citation

Post, Ken. The New States of West Africa. Rev. ed. Penguin Books, 1968.