APA (7th ed.) Citation

Collins, J. L., Pimlott, J., & Simmons, E. H. (1986). Undercover fighters: The British 22nd SAS regiment. Villard Books.

Chicago Style (17th ed.) Citation

Collins, James Lawton, John Pimlott, and Edwin H. Simmons. Undercover Fighters: The British 22nd SAS Regiment. New York: Villard Books, 1986.

MLA (9th ed.) Citation

Collins, James Lawton, et al. Undercover Fighters: The British 22nd SAS Regiment. Villard Books, 1986.