APA (7th ed.) Citation

Parkinson, R. (1971). Clausewitz, a biography. Stein and Day.

Chicago Style (17th ed.) Citation

Parkinson, Roger. Clausewitz, a Biography. New York: Stein and Day, 1971.

MLA (9th ed.) Citation

Parkinson, Roger. Clausewitz, a Biography. Stein and Day, 1971.