Cita APA (7th ed.)

Landau, H. (1937). The enemy within: The inside story of German sabotage in America. G.P. Putnam's sons.

Cita Chicago (17th ed.)

Landau, Henry. The Enemy Within: The Inside Story of German Sabotage in America. [New York]: G.P. Putnam's sons, 1937.

Cita MLA (9th ed.)

Landau, Henry. The Enemy Within: The Inside Story of German Sabotage in America. G.P. Putnam's sons, 1937.