Cita APA

Davis, S. W., & Davis, S. W. (1992). DDC 20 workbook: A practical introduction to the Dewey Decimal Classification (Rev. North American edition.). Albany, N.Y.: Forest Press.

Citación estilo Chicago

Davis, Sydney W., y Sydney W. Davis. DDC 20 Workbook: A Practical Introduction to the Dewey Decimal Classification. Rev. North American edition. Albany, N.Y.: Forest Press, 1992.

Cita MLA

Davis, Sydney W., y Sydney W. Davis. DDC 20 Workbook: A Practical Introduction to the Dewey Decimal Classification. Rev. North American edition. Albany, N.Y.: Forest Press, 1992.