Pennsylvania Prison Society. The Journal of Prison Discipline and Philanthropy, March 1912 New Series No. 51.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPennsylvania Prison Society. The Journal of Prison Discipline and Philanthropy, March 1912 New Series No. 51.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPennsylvania Prison Society. The Journal of Prison Discipline and Philanthropy, March 1912 New Series No. 51.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.