孙艳香. (2017). 中国农产品安全生产的技术进步方向: Directed technical change of China's agriculture product safety. 中国社会科学出版社.
Dyfyniad Arddull Chicago孙艳香. 中国农产品安全生产的技术进步方向: Directed Technical Change of China's Agriculture Product Safety. 中国社会科学出版社, 2017.
Dyfyniad MLA孙艳香. 中国农产品安全生产的技术进步方向: Directed Technical Change of China's Agriculture Product Safety. 中国社会科学出版社, 2017.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.