Παραπομπή APA

Harper, D., & Brown Tony. (1970). Sustainable management of tropical catchments. John Wiley and sons.

Παραπομπή Chicago Style

Harper, David, και Brown Tony. Sustainable Management of Tropical Catchments. New York: John Wiley and sons, 1970.

Παραπομπή MLA

Harper, David, και Brown Tony. Sustainable Management of Tropical Catchments. John Wiley and sons, 1970.