APA (7th ed.) Citation

Dewey, M., & Comaroni, J. P. (1989). Dewey Decimal Classification and relative index: Schedules 000-599 (20th ed.). Forest Press.

Chicago Style (17th ed.) Citation

Dewey, Melvil, and John P. Comaroni. Dewey Decimal Classification and Relative Index: Schedules 000-599. 20th ed. Albany: Forest Press, 1989.

MLA (8th ed.) Citation

Dewey, Melvil, and John P. Comaroni. Dewey Decimal Classification and Relative Index: Schedules 000-599. 20th ed. Forest Press, 1989.