Coven, W. (2018). Heidi Heckelbeck has a new best friend (First Little Simon paperback edition.). Little Simon.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoven, Wanda. Heidi Heckelbeck Has a New Best Friend. First Little Simon paperback edition. New York: Little Simon, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCoven, Wanda. Heidi Heckelbeck Has a New Best Friend. First Little Simon paperback edition. Little Simon, 2018.
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