APA (7th ed.) Citation

Gann, L. H., & Duignan, P. [. a. (1977). The rulers of German Africa 1884-1914. Stanford University Press.

Chicago Style (17th ed.) Citation

Gann, L. H., and Peter [joint author] Duignan. The Rulers of German Africa 1884-1914. California: Stanford University Press, 1977.

MLA (9th ed.) Citation

Gann, L. H., and Peter [joint author] Duignan. The Rulers of German Africa 1884-1914. Stanford University Press, 1977.