APA (7th ed.) Citation

(1993). The Kekulé riddle: A challenge for chemists and psychologists (1. ed.). Cache River Press.

Chicago Style (17th ed.) Citation

The Kekulé Riddle: A Challenge for Chemists and Psychologists. 1. ed. Clearwater, FL u.a: Cache River Press, 1993.

MLA (9th ed.) Citation

The Kekulé Riddle: A Challenge for Chemists and Psychologists. 1. ed. Cache River Press, 1993.