APA (7th ed.) Citation

Krivitsky, W. G. (1940). I was Stalin's agent. Richt Book Club.

Chicago Style (17th ed.) Citation

Krivitsky, W. G. I Was Stalin's Agent. London: Richt Book Club, 1940.

MLA (9th ed.) Citation

Krivitsky, W. G. I Was Stalin's Agent. Richt Book Club, 1940.