Pettrey, D. (2020). The crushing depths. Bethany House, a division of Baker Publishing Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPettrey, Dani. The Crushing Depths. Minneapolis, Minnesota: Bethany House, a division of Baker Publishing Group, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPettrey, Dani. The Crushing Depths. Bethany House, a division of Baker Publishing Group, 2020.
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