APA Edition Citation

Melvil Dewey. (1979). Decimal classification and relative index- 4 vol (21.). Lake placid education foundation.

Chicago Edition Citation

Melvil Dewey. Decimal Classification and Relative Index- 4 Vol. 21. New York: Lake placid education foundation, 1979.

MLA Edition Citation

Melvil Dewey. Decimal Classification and Relative Index- 4 Vol. 21. Lake placid education foundation, 1979.

Warning: These citations may not always be 100% accurate.