Gillingham, S. (2015). How to grow a friend (First edition.). Random House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGillingham, Sara. How to Grow a Friend. First edition. New York: Random House, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGillingham, Sara. How to Grow a Friend. First edition. Random House, 2015.
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