APA (7th ed.) Citation

Johnstone, W. W., & Johnstone, J. A. (2020). They came to kill: A preacher & MacCallister western. Pinnacle Books/Kensington Publishing Corp..

Chicago Style (17th ed.) Citation

Johnstone, William W., and J. A. Johnstone. They Came to Kill: A Preacher & MacCallister Western. New York: Pinnacle Books/Kensington Publishing Corp., 2020.

MLA (8th ed.) Citation

Johnstone, William W., and J. A. Johnstone. They Came to Kill: A Preacher & MacCallister Western. Pinnacle Books/Kensington Publishing Corp., 2020.

Warning: These citations may not always be 100% accurate.