Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Villanueva, Teodoro R. Upland Ecosystem Management. Quezon City: UP Open University, 2005.

Cita MLA (9th ed.)

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