APA (7th ed.) Citation

Downs, F. (1983). The killing zone: My life in the Vietnam War. Berkley Books.

Chicago Style (17th ed.) Citation

Downs, Frederick. The Killing Zone: My Life in the Vietnam War. New York: Berkley Books, 1983.

MLA (9th ed.) Citation

Downs, Frederick. The Killing Zone: My Life in the Vietnam War. Berkley Books, 1983.