Dewey,Melvil. (2011). Dewey decimal classification: III (23 rd.). Online Computer Library Centre.
Lua i Stíl Chicago (17ú heag.)Dewey,Melvil. Dewey Decimal Classification: III. 23 rd. Ohio: Online Computer Library Centre, 2011.
Lua MLA (9ú heag.)Dewey,Melvil. Dewey Decimal Classification: III. 23 rd. Online Computer Library Centre, 2011.
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