APA Edition Citation

Dewey Melvil. (1989). Dewey decimal classificatio and relative index (20.).

Chicago Edition Citation

Dewey Melvil. Dewey Decimal Classificatio and Relative Index. 20. NewYork, Forest Press, 1989.

MLA Edition Citation

Dewey Melvil. Dewey Decimal Classificatio and Relative Index. 20. 1989.

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