APA aipamena

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

Chicago Style aipamena

Villanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. Diliman, Quezon City: UP Open University, 2005.

MLA aipamena

Villanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. UP Open University, 2005.