Não informado. (2021). Unesco Bulletin for Libraries. United Nations Educational, Scientific and Cultural Organization (Unesco).
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Unesco Bulletin for Libraries. Paris: United Nations Educational, Scientific and Cultural Organization (Unesco), 2021.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Unesco Bulletin for Libraries. United Nations Educational, Scientific and Cultural Organization (Unesco), 2021.
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