Ackerman, S. (2022). The codebreaker's secret (Center Point Large Print edition.). Center Point Large Print.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAckerman, Sara. The Codebreaker's Secret. Center Point Large Print edition. Thorndike, Maine: Center Point Large Print, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAckerman, Sara. The Codebreaker's Secret. Center Point Large Print edition. Center Point Large Print, 2022.
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