Wells. Preservation Education. University Press of New England.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWells. Preservation Education. University Press of New England.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWells. Preservation Education. University Press of New England.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.