APA (7th ed.) Citation

Dewey, M. (1996). Dewey decimal classification and relative index (21st edition.). Forest Press.

Chicago Style (17th ed.) Citation

Dewey, Melvil. Dewey Decimal Classification and Relative Index. 21st edition. New York: Forest Press, 1996.

MLA (8th ed.) Citation

Dewey, Melvil. Dewey Decimal Classification and Relative Index. 21st edition. Forest Press, 1996.

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