Harper, D., & Brown Tony. (1970). Sustainable management of tropical catchments. John Wiley and sons.
استشهاد بنمط شيكاغوHarper, David, و Brown Tony. Sustainable Management of Tropical Catchments. New York: John Wiley and sons, 1970.
MLA استشهادHarper, David, و Brown Tony. Sustainable Management of Tropical Catchments. John Wiley and sons, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.