Style de citation APA (7e éd.)

Morel, E. D. (1911). Nigeria: Its peoples and its problems. Smith, Elder.

Style de citation Chicago (17e éd.)

Morel, E. D. Nigeria: Its Peoples and Its Problems. London: Smith, Elder, 1911.

Style de citation MLA (8e éd.)

Morel, E. D. Nigeria: Its Peoples and Its Problems. Smith, Elder, 1911.