APA (7th ed.) Citation

Gann, L. H., & Duignan, P. (1978). The rulers of British Africa: 1870-1914. Helm.

Chicago Style (17th ed.) Citation

Gann, Lewis H., and Peter Duignan. The Rulers of British Africa: 1870-1914. London: Helm, 1978.

MLA (9th ed.) Citation

Gann, Lewis H., and Peter Duignan. The Rulers of British Africa: 1870-1914. Helm, 1978.

Warning: These citations may not always be 100% accurate.