Arya, R. L. (2015). Objective agronomy. Scientific Publishers.
Cita Chicago (17th ed.)Arya, R. L. Objective Agronomy. Jodhpur: Scientific Publishers, 2015.
Cita MLA (9th ed.)Arya, R. L. Objective Agronomy. Scientific Publishers, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.