APA (7e ed.) Bronvermelding

Villanueva, T. (2005). Upland ecosystem management (Second edition.). University of the Philippines, Open University.

Chicago (17e ed.) Bronvermelding

Villanueva, Teodoro. Upland Ecosystem Management. Second edition. Quezon City: University of the Philippines, Open University, 2005.

MLA (9e ed.) Bronvermelding

Villanueva, Teodoro. Upland Ecosystem Management. Second edition. University of the Philippines, Open University, 2005.