Não informado. (1964). Index of Conference Proceedings Received by the NLL. National Lending Library for Science and Technology.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Index of Conference Proceedings Received by the NLL. Boston, Inglaterra: National Lending Library for Science and Technology, 1964.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Index of Conference Proceedings Received by the NLL. National Lending Library for Science and Technology, 1964.
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