APA (7th ed.) Citation

Schnitzer, M., & Khan, S. U. (1972). Humic substances in the environment. M. Dekker.

Chicago Style (17th ed.) Citation

Schnitzer, M., and Shahamat U. Khan. Humic Substances in the Environment. New York: M. Dekker, 1972.

MLA (9th ed.) Citation

Schnitzer, M., and Shahamat U. Khan. Humic Substances in the Environment. M. Dekker, 1972.