Παραπομπή APA

Katzan H. (1979). Dewey decimal classification and relative index (19.). Forest Press.

Παραπομπή Chicago Style

Katzan H. Dewey Decimal Classification and Relative Index. 19. London: Forest Press, 1979.

Παραπομπή MLA

Katzan H. Dewey Decimal Classification and Relative Index. 19. Forest Press, 1979.