Não informado. (1971). R & D Projects in Documentation and Librarianship. International Federation for Documentation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. R & D Projects in Documentation and Librarianship. The Hague, Holanda: International Federation for Documentation, 1971.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. R & D Projects in Documentation and Librarianship. International Federation for Documentation, 1971.
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