APA (7th ed.) Citation

(2011). Dewey Decimal Classification (DDC 23) Vol.4. OCLC.

Chicago Style (17th ed.) Citation

Dewey Decimal Classification (DDC 23) Vol.4. OCLC, 2011.

MLA (8th ed.) Citation

Dewey Decimal Classification (DDC 23) Vol.4. OCLC, 2011.

Warning: These citations may not always be 100% accurate.