Não informado. Tropical Soils Research Program, Annual Report. North Carolina State University, Soil Science Department.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Tropical Soils Research Program, Annual Report. Raleigh, NC: North Carolina State University, Soil Science Department.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Tropical Soils Research Program, Annual Report. North Carolina State University, Soil Science Department.
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