APA (7th ed.) Citation

Kepner, R. A., Bainer, R., & Barger, E. L. (1972). Principles of farm machinery (2d ed.). Avi Pub. Co..

Chicago Style (17th ed.) Citation

Kepner, Robert Allen, Roy Bainer, and E. L. Barger. Principles of Farm Machinery. 2d ed. Westport, Conn.: Avi Pub. Co., 1972.

MLA (9th ed.) Citation

Kepner, Robert Allen, et al. Principles of Farm Machinery. 2d ed. Avi Pub. Co., 1972.