APA Citatie

Dewey, M. (1979). Dewey decimal classification and relative index (Ed.19.).

Chicago Style citaat

Dewey, Melvil. Dewey Decimal Classification and Relative Index. Ed.19. New York, Online Computer Library Centre, 1979.

MLA citatie

Dewey, Melvil. Dewey Decimal Classification and Relative Index. Ed.19. 1979.