Não informado. (1951). Annual Report of the International Tin Research Council. International Tin Research Institute.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Annual Report of the International Tin Research Council. Greenford, Inglaterra: International Tin Research Institute, 1951.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Annual Report of the International Tin Research Council. International Tin Research Institute, 1951.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.