Younts, E. B. (2015). Promise to keep (Large print edition.). Thorndike Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रYounts, Elizabeth Byler. Promise to Keep. Large print edition. Waterville, Maine: Thorndike Press, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रYounts, Elizabeth Byler. Promise to Keep. Large print edition. Thorndike Press, 2015.
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