Cita APA (7a ed.)

Firth, C. F., & Firth, C. B. (1946). From Napoleon to Hitler (2. impression.). Ginn.

Cita Chicago Style (17a ed.)

Firth, Caterhine F., y Catherine B. Firth. From Napoleon to Hitler. 2. impression. London: Ginn, 1946.

Cita MLA (9a ed.)

Firth, Caterhine F., y Catherine B. Firth. From Napoleon to Hitler. 2. impression. Ginn, 1946.