Cita APA (7a ed.)

Somervell, D. (1942). The British Empire (5. ed.). Cristophers.

Cita Chicago Style (17a ed.)

Somervell, D.C. The British Empire. 5. ed. London: Cristophers, 1942.

Cita MLA (8a ed.)

Somervell, D.C. The British Empire. 5. ed. Cristophers, 1942.