Cita APA

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

Citación estilo Chicago

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

Cita MLA

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