Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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