Mortimer, M. (1998). Learn Dewey decimal classification (21st edition.). DocMatrix.
Chicago Style (17th ed.) CitationMortimer, Mary. Learn Dewey Decimal Classification. 21st edition. Canberra: DocMatrix, 1998.
MLA (9th ed.) CitationMortimer, Mary. Learn Dewey Decimal Classification. 21st edition. DocMatrix, 1998.
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