Não informado. (1972). Forestry digest. University of the Philippines, College of Forestry, Department of Forestry.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Forestry Digest. Laguna, Filipinas: University of the Philippines, College of Forestry, Department of Forestry, 1972.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Forestry Digest. University of the Philippines, College of Forestry, Department of Forestry, 1972.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.