APA

Stone A. a., Gulvin H. a., . (1977). Machines for power farming. New York: John Wiley & Sons.

Chicago

Stone Archie a, Gulvin Harold a, . 1977. Machines for power farming. New York: John Wiley & Sons.

Harvard

Stone A. a., Gulvin H. a., . (1977). Machines for power farming. New York: John Wiley & Sons.

MLA

Stone Archie a, Gulvin Harold a, . Machines for power farming. New York: John Wiley & Sons. 1977.