Não informado. (1972). Forestry digest. University of the Philippines, College of Forestry, Department of Forestry.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Forestry Digest. Laguna, Filipinas: University of the Philippines, College of Forestry, Department of Forestry, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Forestry Digest. University of the Philippines, College of Forestry, Department of Forestry, 1972.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.