APA (7th ed.) Citation

Lazy RL Ranch, Lorenz, R. L., & Trumble, E. (1949). Annual roundup: Western Christmas cards. The Lazy RL Ranch.

Chicago Style (17th ed.) Citation

Lazy RL Ranch, Robert L. Lorenz, and Ed Trumble. Annual Roundup: Western Christmas Cards. [Denver?]: The Lazy RL Ranch, 1949.

MLA (9th ed.) Citation

Lazy RL Ranch, et al. Annual Roundup: Western Christmas Cards. The Lazy RL Ranch, 1949.