Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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