Não informado. (1967). Phosphorus in agriculture. International Superphosphate and Compound Manufacturers Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Phosphorus in Agriculture. London: International Superphosphate and Compound Manufacturers Association, 1967.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Phosphorus in Agriculture. International Superphosphate and Compound Manufacturers Association, 1967.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.