Cita APA (7th ed.)

Dewey Melvil. (1971). Decimal Classification and Relative Index vol 3 Relative Index (18th.). Forest press Inc.

Cita Chicago (17th ed.)

Dewey Melvil. Decimal Classification and Relative Index Vol 3 Relative Index. 18th. New York: Forest press Inc, 1971.

Cita MLA (9th ed.)

Dewey Melvil. Decimal Classification and Relative Index Vol 3 Relative Index. 18th. Forest press Inc, 1971.