APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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