Dewey,Melvil. (2011). Dewey decimal classification: III (23 rd.). Online Computer Library Centre.
Cita Chicago (17th ed.)Dewey,Melvil. Dewey Decimal Classification: III. 23 rd. Ohio: Online Computer Library Centre, 2011.
Cita MLA (9th ed.)Dewey,Melvil. Dewey Decimal Classification: III. 23 rd. Online Computer Library Centre, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.