Cita APA (7th ed.)

Butterfield, H. (1939). Napoleon. Collier Books.

Cita Chicago (17th ed.)

Butterfield, Herbert. Napoleon. New York: Collier Books, 1939.

Cita MLA (8th ed.)

Butterfield, Herbert. Napoleon. Collier Books, 1939.

Atenció: Aquestes cites poden no estar 100% correctes.