APA (7th ed.) Citation

Keegan, J. (1987). The mask of command (1st American ed.). Viking.

Chicago Style (17th ed.) Citation

Keegan, John. The Mask of Command. 1st American ed. New York, NY: Viking, 1987.

MLA (9th ed.) Citation

Keegan, John. The Mask of Command. 1st American ed. Viking, 1987.