Não informado. (1977). Library Acquisitions: Practice and theory. Pergamon Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Library Acquisitions: Practice and Theory. New York: Pergamon Press, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Library Acquisitions: Practice and Theory. Pergamon Press, 1977.
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