APA (7th ed.) Citation

Carr, J. D. (1956). Patrick Butler for the defence: A detective novel. Harper.

Chicago Style (17th ed.) Citation

Carr, John Dickson. Patrick Butler for the Defence: A Detective Novel. New York: Harper, 1956.

MLA (9th ed.) Citation

Carr, John Dickson. Patrick Butler for the Defence: A Detective Novel. Harper, 1956.