Villanueva, T. R. (2005). Upland ecosystem management (2nd ed.). University of the Philippines Open University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. Quezon City: University of the Philippines Open University, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillanueva, Teodoro R. Upland Ecosystem Management. 2nd ed. University of the Philippines Open University, 2005.
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