Hopkins, J. A., & Murray, W. G. (1953). Elements of farm management (4th ed.). Prentice-Hall.
Cita Chicago (17th ed.)Hopkins, John A., i William Gordon Murray. Elements of Farm Management. 4th ed. New York: Prentice-Hall, 1953.
Cita MLA (9th ed.)Hopkins, John A., i William Gordon Murray. Elements of Farm Management. 4th ed. Prentice-Hall, 1953.
Atenció: Aquestes cites poden no estar 100% correctes.