Cita APA (7a ed.)

Carlson, J. R. (1943). Under cover: My four years in the Nazi underworld of America - the amazing revelations of how Axis agents and our enemies within are now plotting to destroy the United States. Blakiston.

Cita Chicago Style (17a ed.)

Carlson, John Roy. Under Cover: My Four Years in the Nazi Underworld of America - the Amazing Revelations of How Axis Agents and Our Enemies Within Are Now Plotting to Destroy the United States. Philadelphia: Blakiston, 1943.

Cita MLA (9a ed.)

Carlson, John Roy. Under Cover: My Four Years in the Nazi Underworld of America - the Amazing Revelations of How Axis Agents and Our Enemies Within Are Now Plotting to Destroy the United States. Blakiston, 1943.