Gale Research Company. (1960). Acronyms dictionary: A guide to alphabetic designations, contractions, and initialisms : association, aerospace, business, electronic, governmental, international, labor, military public affairs, scientific, societies, technical, transporation, United Nations. s.n.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিGale Research Company. Acronyms Dictionary: A Guide to Alphabetic Designations, Contractions, and Initialisms : Association, Aerospace, Business, Electronic, Governmental, International, Labor, Military Public Affairs, Scientific, Societies, Technical, Transporation, United Nations. Detroit: s.n, 1960.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিGale Research Company. Acronyms Dictionary: A Guide to Alphabetic Designations, Contractions, and Initialisms : Association, Aerospace, Business, Electronic, Governmental, International, Labor, Military Public Affairs, Scientific, Societies, Technical, Transporation, United Nations. s.n, 1960.