Quentin, P. (1973). A puzzle for fools. Gollancz.
Cita Chicago (17th ed.)Quentin, Patrick. A Puzzle for Fools. London: Gollancz, 1973.
Cita MLA (8th ed.)Quentin, Patrick. A Puzzle for Fools. Gollancz, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.