APA (7th ed.) Citation

Light, R. U., & Light, M. U. (1941). Focus on Africa. American Geographical Society.

Chicago Style (17th ed.) Citation

Light, Richard Upjohn, and Mary Upjohn Light. Focus on Africa. New York: American Geographical Society, 1941.

MLA (9th ed.) Citation

Light, Richard Upjohn, and Mary Upjohn Light. Focus on Africa. American Geographical Society, 1941.