Collette, K. (2019). The helpline: A novel (First Atria Books hardcover edition.). Atria Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCollette, Katherine. The Helpline: A Novel. First Atria Books hardcover edition. New York: Atria Books, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCollette, Katherine. The Helpline: A Novel. First Atria Books hardcover edition. Atria Books, 2019.
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