Higgins, R. T. (2024). Penelope Rex and the problem with pets (First edition.). Disney-Hyperion.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHiggins, Ryan T. Penelope Rex and the Problem with Pets. First edition. Los Angeles: Disney-Hyperion, 2024.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHiggins, Ryan T. Penelope Rex and the Problem with Pets. First edition. Disney-Hyperion, 2024.
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