APA (7th ed.) Citation

Cronin, A. J. (1941). The keys of the kingdom. Little, Brown.

Chicago Style (17th ed.) Citation

Cronin, A. J. The Keys of the Kingdom. Boston: Little, Brown, 1941.

MLA (9th ed.) Citation

Cronin, A. J. The Keys of the Kingdom. Little, Brown, 1941.

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