Cita APA (7a ed.)

Crowder, M. (1977). West Africa: An introduction to its history. Longman.

Cita Chicago Style (17a ed.)

Crowder, Michael. West Africa: An Introduction to Its History. London: Longman, 1977.

Cita MLA (9a ed.)

Crowder, Michael. West Africa: An Introduction to Its History. Longman, 1977.