Muhammad Riaz. (1992). Introduction to the twentieth edition of the Dewey Decimal Classification. Library Association.
Chicago Edition CitationMuhammad Riaz. Introduction to the Twentieth Edition of the Dewey Decimal Classification. London: Library Association, 1992.
MLA Edition CitationMuhammad Riaz. Introduction to the Twentieth Edition of the Dewey Decimal Classification. Library Association, 1992.
Warning: These citations may not always be 100% accurate.