APA (7th ed.) Citation

Postel, A. W. (1943). The mineral resources of Africa. University of Pennsylvania press, University museum.

Chicago Style (17th ed.) Citation

Postel, A. Williams. The Mineral Resources of Africa. Phildelphia [sic]: University of Pennsylvania press, University museum, 1943.

MLA (9th ed.) Citation

Postel, A. Williams. The Mineral Resources of Africa. University of Pennsylvania press, University museum, 1943.