Não informado. (1950). Annual Conference Proceedings of the American Library Association. American Library Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Annual Conference Proceedings of the American Library Association. Chicago, Ill: American Library Association, 1950.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Annual Conference Proceedings of the American Library Association. American Library Association, 1950.
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