APA (7th ed.) Citation

Ludwig, E., Paul, E., & Paul, C. (1965). Napoleón. Pocket Cardinal.

Chicago Style (17th ed.) Citation

Ludwig, Emil, Eden Paul, and Cedar Paul. Napoleón. New York: Pocket Cardinal, 1965.

MLA (9th ed.) Citation

Ludwig, Emil, et al. Napoleón. Pocket Cardinal, 1965.