APA (7th ed.) Citation

Githens, T. S. 1. (1949). Drug plants of Africa. University of Pennsylvania Press.

Chicago Style (17th ed.) Citation

Githens, Thomas S 1878. Drug Plants of Africa. Philadelphia: University of Pennsylvania Press, 1949.

MLA (9th ed.) Citation

Githens, Thomas S 1878. Drug Plants of Africa. University of Pennsylvania Press, 1949.