APA (7th ed.) Citation

Speidel, H., Biddle, A. J. D., & Speidel, H. (1950). Invasion 1944: Rommel and the Normandy campaign. Regnery.

Chicago Style (17th ed.) Citation

Speidel, Hans, Anthony J. Drexel Biddle, and Hans Speidel. Invasion 1944: Rommel and the Normandy Campaign. Chicago: Regnery, 1950.

MLA (9th ed.) Citation

Speidel, Hans, et al. Invasion 1944: Rommel and the Normandy Campaign. Regnery, 1950.