APA (7th ed.) Citation

Humphries, J. (2012). Spying for Hitler: The Welsh double-cross. University of Wales Press.

Chicago Style (17th ed.) Citation

Humphries, John. Spying for Hitler: The Welsh Double-cross. Cardiff: University of Wales Press, 2012.

MLA (9th ed.) Citation

Humphries, John. Spying for Hitler: The Welsh Double-cross. University of Wales Press, 2012.

Warning: These citations may not always be 100% accurate.