..., H. s. i. s. (1994). Humic substances in soil and crop sciences: Selected readings - Editor P. MacCarthy .... (et.al.). American Society of Agronomy Inc.
Chicago Style Citation..., Humic substances in soil. Humic Substances in Soil and Crop Sciences: Selected Readings - Editor P. MacCarthy .... (et.al.). American Society of Agronomy Inc, 1994.
MLA Citation..., Humic substances in soil. Humic Substances in Soil and Crop Sciences: Selected Readings - Editor P. MacCarthy .... (et.al.). American Society of Agronomy Inc, 1994.
Warning: These citations may not always be 100% accurate.