Johnson R D & Sengupta B. (1977). Library classification. The World Press Ltd.
Chicago Edition CitationJohnson R D and Sengupta B. Library Classification. Calcutta: The World Press Ltd, 1977.
MLA Edition CitationJohnson R D and Sengupta B. Library Classification. The World Press Ltd, 1977.
Warning: These citations may not always be 100% accurate.