Não informado. (1964). Index of Conference Proceedings Received by the NLL. National Lending Library for Science and Technology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Index of Conference Proceedings Received by the NLL. Boston, Inglaterra: National Lending Library for Science and Technology, 1964.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Index of Conference Proceedings Received by the NLL. National Lending Library for Science and Technology, 1964.
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