APA (7th ed.) Citation

Callahan, B. (1993). Who shot JFK?: A guide to the major conspiracy theories. Simon & Schuster.

Chicago Style (17th ed.) Citation

Callahan, Bob. Who Shot JFK?: A Guide to the Major Conspiracy Theories. New York u.a: Simon & Schuster, 1993.

MLA (9th ed.) Citation

Callahan, Bob. Who Shot JFK?: A Guide to the Major Conspiracy Theories. Simon & Schuster, 1993.