APA (7th ed.) Citation

Kimble, G. H. (1960). Tropical Africa. The Twentieth Century Fund.

Chicago Style (17th ed.) Citation

Kimble, George H.T. Tropical Africa. New York: The Twentieth Century Fund, 1960.

MLA (9th ed.) Citation

Kimble, George H.T. Tropical Africa. The Twentieth Century Fund, 1960.