Peterson, A., & Sutphin, J. (2020). On the edge of the Dark Sea of Darkness (First hardcover edition.). WaterBrook Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPeterson, Andrew, और Joe Sutphin. On the Edge of the Dark Sea of Darkness. First hardcover edition. Colorado Springs, Colo.: WaterBrook Press, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPeterson, Andrew, और Joe Sutphin. On the Edge of the Dark Sea of Darkness. First hardcover edition. WaterBrook Press, 2020.
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