Bonell,(et.All), M.(1993).Hydrology and Water Management in the Humid Tropics : Hydrological research issues and strategies for water management .New York:CAMBRIDGE UNIVERSITY PRESS.
Gaya MLA
Bonell,(et.All), Michael."Hydrology and Water Management in the Humid Tropics : Hydrological research issues and strategies for water management".New York:CAMBRIDGE UNIVERSITY PRESS,1993.Buku Pelajaran.