United Nations. Industrial Development Organization, V. (1969). Studies in the development of plastics industries (Petro-chemical ...No.4). United Nations.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations. Industrial Development Organization, Vienna. Studies in the Development of Plastics Industries (Petro-chemical ...No.4). United Nations, 1969.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited Nations. Industrial Development Organization, Vienna. Studies in the Development of Plastics Industries (Petro-chemical ...No.4). United Nations, 1969.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.