Crystal, D. (2013). Spell it out: The curious, enthralling and extraordinary story of English spelling (First U.S. edition.). St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrystal, David. Spell It Out: The Curious, Enthralling and Extraordinary Story of English Spelling. First U.S. edition. New York: St. Martin's Press, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCrystal, David. Spell It Out: The Curious, Enthralling and Extraordinary Story of English Spelling. First U.S. edition. St. Martin's Press, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.