Cita APA

Petrow, R. (1974). The bitter years: The invasion and occupation of Denmark and Norway, April 1940-May 1945. Morrow.

Citación estilo Chicago

Petrow, Richard. The Bitter Years: The Invasion and Occupation of Denmark and Norway, April 1940-May 1945. New York, NY: Morrow, 1974.

Cita MLA

Petrow, Richard. The Bitter Years: The Invasion and Occupation of Denmark and Norway, April 1940-May 1945. Morrow, 1974.