Style de citation APA

Ralston A. (1996). Dewey decimal classification ED.21 vol.2 (21.). Online computer.

Style de citation Chicago

Ralston A. Dewey Decimal Classification ED.21 Vol.2. 21. New York: Online computer, 1996.

Style de citation MLA

Ralston A. Dewey Decimal Classification ED.21 Vol.2. 21. Online computer, 1996.