Dewey, M. (1971). Dewey decimal classification and relative index (18th. ed.). Forest Press, a division of OCLC Online Computer Library Center.
Chicago-viite (17. p.)Dewey, Melvil. Dewey Decimal Classification and Relative Index. 18th. ed. Albany, N.Y.: Forest Press, a division of OCLC Online Computer Library Center, 1971.
MLA-viite (9. p.)Dewey, Melvil. Dewey Decimal Classification and Relative Index. 18th. ed. Forest Press, a division of OCLC Online Computer Library Center, 1971.
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