APA Citatie

Weihs J. (1996). Dewey decimal classification ED.21 vol.2 (21.). Online computer.

Chicago Style citaat

Weihs J. Dewey Decimal Classification ED.21 Vol.2. 21. New York: Online computer, 1996.

MLA citatie

Weihs J. Dewey Decimal Classification ED.21 Vol.2. 21. Online computer, 1996.