Não informado. (1948). What-s new in crops and soils. American Society of Agronomy.
Cita Chicago Style (17a ed.)Não informado. What-s New in Crops and Soils. Madison, Wis: American Society of Agronomy, 1948.
Cita MLA (8a ed.)Não informado. What-s New in Crops and Soils. American Society of Agronomy, 1948.
Precaución: Estas citas no son 100% exactas.