APA (7th ed.) Citation

Freeman, R. A. (1952). The puzzle lock: And other cases of Dr. Thorndyke. Pan Books.

Chicago Style (17th ed.) Citation

Freeman, Richard Austin. The Puzzle Lock: And Other Cases of Dr. Thorndyke. Londres: Pan Books, 1952.

MLA (9th ed.) Citation

Freeman, Richard Austin. The Puzzle Lock: And Other Cases of Dr. Thorndyke. Pan Books, 1952.