Cita APA (7a ed.)

Ludwig, E. (1956). Napoleon (12th impr.). George Allen and Unwin.

Cita Chicago Style (17a ed.)

Ludwig, Emil. Napoleon. 12th impr. London: George Allen and Unwin, 1956.

Cita MLA (9a ed.)

Ludwig, Emil. Napoleon. 12th impr. George Allen and Unwin, 1956.