Locke, K. (2019). The spy with the red balloon (Paperback edition.). Albert Whitman & Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLocke, Katherine. The Spy with the Red Balloon. Paperback edition. Chicago, Illinois: Albert Whitman & Company, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLocke, Katherine. The Spy with the Red Balloon. Paperback edition. Albert Whitman & Company, 2019.
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