(1982). Nitrogen in agricultural soils. Wisconsin, USA: American Society of Agronomy, Inc.
Trích dẫn kiểu ChicagoNitrogen in Agricultural Soils. Wisconsin, USA: American Society of Agronomy, Inc, 1982.
MLA引文Nitrogen in Agricultural Soils. Wisconsin, USA: American Society of Agronomy, Inc, 1982.
警告:這些引文格式不一定是100%准確.