Christie, A. (2013). The seven dials mystery (Center Point Large Print edition.). Center Point Large Print.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChristie, Agatha. The Seven Dials Mystery. Center Point Large Print edition. Thorndike, Maine: Center Point Large Print, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChristie, Agatha. The Seven Dials Mystery. Center Point Large Print edition. Center Point Large Print, 2013.
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