Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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