Não informado. (1970). Forest Research Series. Clemson University, Department of Forestry.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Forest Research Series. Clemson, SC: Clemson University, Department of Forestry, 1970.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Forest Research Series. Clemson University, Department of Forestry, 1970.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.