Marsh, K. (2017). The door by the staircase (First paperback edition.). Disney/Hyperion.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarsh, Katherine. The Door by the Staircase. First paperback edition. Los Angeles: Disney/Hyperion, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarsh, Katherine. The Door by the Staircase. First paperback edition. Disney/Hyperion, 2017.
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