Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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