APA (7th ed.) Citation

Dewey, M. (1989). Dewey decimal classification and relative index (Edition 20.). JMC Press.

Chicago Style (17th ed.) Citation

Dewey, Melvil. Dewey Decimal Classification and Relative Index. Edition 20. Quezon City: JMC Press, 1989.

MLA (9th ed.) Citation

Dewey, Melvil. Dewey Decimal Classification and Relative Index. Edition 20. JMC Press, 1989.

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