Gaya APA

R, A. et al (1985). Humic Subtances in Soil Sediment And Water Geochemistry Isolatoin and Characterization . New York: John Wiley and Sons,.

Gaya MLA

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