Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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