APA (7th ed.) Citation

Walsh, J. M. (1937). Spies in Spain: The story of a freelance spy. Collins.

Chicago Style (17th ed.) Citation

Walsh, J. M. Spies in Spain: The Story of a Freelance Spy. London: Collins, 1937.

MLA (8th ed.) Citation

Walsh, J. M. Spies in Spain: The Story of a Freelance Spy. Collins, 1937.

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