Ryan, S. (2016). Whisker of trouble. Obsidian, an imprint of New American Library, a division of Penguin Group (USA) LLC.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, Sofie. Whisker of Trouble. New York, New York: Obsidian, an imprint of New American Library, a division of Penguin Group (USA) LLC, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, Sofie. Whisker of Trouble. Obsidian, an imprint of New American Library, a division of Penguin Group (USA) LLC, 2016.
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