Dewey, M., & Comaromi, J. P. (1989). Dewey decimal classification and relative index (Ed. 20.). Forest Press, a division of OCLC Online Computer Library Center.
Chicago Style (17th ed.) CitationDewey, Melvil, and John P. Comaromi. Dewey Decimal Classification and Relative Index. Ed. 20. Albany, NY: Forest Press, a division of OCLC Online Computer Library Center, 1989.
MLA (9th ed.) CitationDewey, Melvil, and John P. Comaromi. Dewey Decimal Classification and Relative Index. Ed. 20. Forest Press, a division of OCLC Online Computer Library Center, 1989.
Warning: These citations may not always be 100% accurate.