Cita APA (7th ed.)

Dewey, M. (1989). Dewey decimal classification and relative index (20th ed.). Forest Press.

Cita Chicago (17th ed.)

Dewey, Melvil. Dewey Decimal Classification and Relative Index. 20th ed. Albany, New York: Forest Press, 1989.

Cita MLA (9th ed.)

Dewey, Melvil. Dewey Decimal Classification and Relative Index. 20th ed. Forest Press, 1989.