Gaya APA

Aiken, G, R. et al (1985). Humic Substances in Soil, Sediment and Water : Geochemistry, Isolation, and Characterization . New York: John Wiley & Sons.

Gaya MLA

Aiken, George, R. et al. "Humic Substances in Soil, Sediment and Water : Geochemistry, Isolation, and Characterization". New York: John Wiley & Sons, 1985. Text.