Não informado. (1971). R & D Projects in Documentation and Librarianship. International Federation for Documentation.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. R & D Projects in Documentation and Librarianship. The Hague, Holanda: International Federation for Documentation, 1971.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. R & D Projects in Documentation and Librarianship. International Federation for Documentation, 1971.
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