British Standards Institution, L. (1961). Universal decimal classification: Abridged English edition. The author.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBritish Standards Institution, London. Universal Decimal Classification: Abridged English Edition. The author, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBritish Standards Institution, London. Universal Decimal Classification: Abridged English Edition. The author, 1961.
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