APA (7th ed.) Citation

Pol, H. (1943). The hidden enemy: The German threat to post-war peace. J. Messner, inc..

Chicago Style (17th ed.) Citation

Pol, Heinz. The Hidden Enemy: The German Threat to Post-war Peace. New York: J. Messner, inc., 1943.

MLA (9th ed.) Citation

Pol, Heinz. The Hidden Enemy: The German Threat to Post-war Peace. J. Messner, inc., 1943.