APA (7th ed.) Citation

National Geographic Society (U.S.). Cartographic Division & Bumstead, A. H. (1935). Africa. [publisher not identified].

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.). Cartographic Division and Albert H. Bumstead. Africa. Washington: [publisher not identified], 1935.

MLA (9th ed.) Citation

National Geographic Society (U.S.). Cartographic Division and Albert H. Bumstead. Africa. [publisher not identified], 1935.