APA (7th ed.) Citation

Joffroy, P. (1971). A spy for God: The ordeal of Kurt Gerstein. Collins.

Chicago Style (17th ed.) Citation

Joffroy, Pierre. A Spy for God: The Ordeal of Kurt Gerstein. London: Collins, 1971.

MLA (8th ed.) Citation

Joffroy, Pierre. A Spy for God: The Ordeal of Kurt Gerstein. Collins, 1971.