Não informado. (1972). Journal of agronomic education. American Society of Agronomy.
Cita Chicago Style (17a ed.)Não informado. Journal of Agronomic Education. Madison, Wis: American Society of Agronomy, 1972.
Cita MLA (8a ed.)Não informado. Journal of Agronomic Education. American Society of Agronomy, 1972.
Precaución: Estas citas no son 100% exactas.