Anonymous. Society for Superseding the Necessity of Climbing Boys, by Encouraging a New Method of Sweeping Chimneys: Twenty-First Report, May 1, 1837.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAnonymous. Society for Superseding the Necessity of Climbing Boys, by Encouraging a New Method of Sweeping Chimneys: Twenty-First Report, May 1, 1837.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAnonymous. Society for Superseding the Necessity of Climbing Boys, by Encouraging a New Method of Sweeping Chimneys: Twenty-First Report, May 1, 1837.
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