Perplies, B., & Cleef, L. V. (2020). Black Leviathan: The first journey into the Cloudmere (First U.S. edition.). Tor, a Tom Doherty Associates Book.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerplies, Bernd, और Lucy Van Cleef. Black Leviathan: The First Journey into the Cloudmere. First U.S. edition. New York: Tor, a Tom Doherty Associates Book, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPerplies, Bernd, और Lucy Van Cleef. Black Leviathan: The First Journey into the Cloudmere. First U.S. edition. Tor, a Tom Doherty Associates Book, 2020.
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