APA (7th ed.) Citation

International Humic Substances Society & MacCarthy, P. (1990). Humic substances in soil and crop sciences: Selected readings : proceedings of a symposium cosponsored by the International Humic Substances Society ... Chicago, Illinois, 2 December 1985. American Society of Agronomy : Soil Science Society of America.

Chicago Style (17th ed.) Citation

International Humic Substances Society and Patrick MacCarthy. Humic Substances in Soil and Crop Sciences: Selected Readings : Proceedings of a Symposium Cosponsored by the International Humic Substances Society ... Chicago, Illinois, 2 December 1985. Madison, Wis., USA: American Society of Agronomy : Soil Science Society of America, 1990.

MLA (9th ed.) Citation

International Humic Substances Society and Patrick MacCarthy. Humic Substances in Soil and Crop Sciences: Selected Readings : Proceedings of a Symposium Cosponsored by the International Humic Substances Society ... Chicago, Illinois, 2 December 1985. American Society of Agronomy : Soil Science Society of America, 1990.