APA (7th ed.) Citation

Kopel, D. B. (1995). Guns: Who should have them? Prometheus Books.

Chicago Style (17th ed.) Citation

Kopel, David B. Guns: Who Should Have Them? Amherst, NY: Prometheus Books, 1995.

MLA (9th ed.) Citation

Kopel, David B. Guns: Who Should Have Them? Prometheus Books, 1995.