Cita APA (7th ed.)
Summers, G. J. (1972). Test your logic: 50 puzzles in deductive reasoning. Dover Publications, Inc..
Cita Chicago (17th ed.)
Summers, George J. Test Your Logic: 50 Puzzles in Deductive Reasoning. New York: Dover Publications, Inc., 1972.
Cita MLA (9th ed.)
Summers, George J. Test Your Logic: 50 Puzzles in Deductive Reasoning. Dover Publications, Inc., 1972.
Atenció: Aquestes cites poden no estar 100% correctes.