Villanueva, T. (2005). Upland ecosystem management (Second edition.). University of the Philippines, Open University.
Chicago (17e ed.) BronvermeldingVillanueva, Teodoro. Upland Ecosystem Management. Second edition. Quezon City: University of the Philippines, Open University, 2005.
MLA (9e ed.) BronvermeldingVillanueva, Teodoro. Upland Ecosystem Management. Second edition. University of the Philippines, Open University, 2005.
Let op: Deze citaties zijn niet altijd 100% accuraat.