Billingham, M. (2019). Their little secret (First Grove Atlantic hardcover edition.). Atlantic Monthly Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBillingham, Mark. Their Little Secret. First Grove Atlantic hardcover edition. New York: Atlantic Monthly Press, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBillingham, Mark. Their Little Secret. First Grove Atlantic hardcover edition. Atlantic Monthly Press, 2019.
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