APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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