APA (7th ed.) Citation

Gordon, C. H. (1974). Riddles in history. Crown Publishers.

Chicago Style (17th ed.) Citation

Gordon, Cyrus H. Riddles in History. New York: Crown Publishers, 1974.

MLA (9th ed.) Citation

Gordon, Cyrus H. Riddles in History. Crown Publishers, 1974.

Warning: These citations may not always be 100% accurate.