Cita APA

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

Citación estilo Chicago

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

Cita MLA

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