Cita APA

Villanueva, T. R. (2005). Upland ecosystem management (2nd ed.). University of the Philippines Open University.

Citación estilo Chicago

Villanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. Quezon City: University of the Philippines Open University, 2005.

Cita MLA

Villanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. University of the Philippines Open University, 2005.