Sangatanan, P. D., & Sangatanan, R. L. (1989). Organic farming. 3M Books, Inc.
芝加哥风格引文Sangatanan, Pedro D., 与 Rone L. Sangatanan. Organic Farming. Quezon City, Phils: 3M Books, Inc, 1989.
MLA引文Sangatanan, Pedro D., 与 Rone L. Sangatanan. Organic Farming. 3M Books, Inc, 1989.
警告：这些引文格式不一定是100％准确.