APA (7th ed.) Citation

Sangatanan, P. D., & Sangatanan, R. L. (1989). Organic farming. 3M Books, Inc.

Chicago Style (17th ed.) Citation

Sangatanan, Pedro D., and Rone L. Sangatanan. Organic Farming. Quezon City, Phils: 3M Books, Inc, 1989.

MLA (9th ed.) Citation

Sangatanan, Pedro D., and Rone L. Sangatanan. Organic Farming. 3M Books, Inc, 1989.