APA (7th ed.) Citation

Koop, W. E. (1965). Billy the Kid: The trail of a Kansas legend. [Kansas City Posse of the Westerners].

Chicago Style (17th ed.) Citation

Koop, W. E. Billy the Kid: The Trail of a Kansas Legend. [Kansas City, Mo.]: [Kansas City Posse of the Westerners], 1965.

MLA (9th ed.) Citation

Koop, W. E. Billy the Kid: The Trail of a Kansas Legend. [Kansas City Posse of the Westerners], 1965.