APA (7th ed.) Citation

Colt, G. H. (1991). The enigma of suicide. Summit Books.

Chicago Style (17th ed.) Citation

Colt, George H. The Enigma of Suicide. New York [u.a.]: Summit Books, 1991.

MLA (9th ed.) Citation

Colt, George H. The Enigma of Suicide. Summit Books, 1991.