Harper,David, & Brown, T. (1998). Sustainable management of tropical catchments. John Wiley.
Dyfyniad Arddull ChicagoHarper,David, and Tony Brown. Sustainable Management of Tropical Catchments. New York: John Wiley, 1998.
Dyfyniad MLAHarper,David, and Tony Brown. Sustainable Management of Tropical Catchments. John Wiley, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.