Raju, A. A. N. (1995). Dewey decimal classification (DDC 20) theory and practice: A practical and self instructional manual. T. R. Pubs.
Cita Chicago (17th ed.)Raju, A. A. N. Dewey Decimal Classification (DDC 20) Theory and Practice: A Practical and Self Instructional Manual. T. Nagar: T. R. Pubs, 1995.
Cita MLA (9th ed.)Raju, A. A. N. Dewey Decimal Classification (DDC 20) Theory and Practice: A Practical and Self Instructional Manual. T. R. Pubs, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.