Gibbs, S. (2023). Spy school goes north (First edition.). Simon & Schuster Books for Young Readers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGibbs, Stuart. Spy School Goes North. First edition. New York: Simon & Schuster Books for Young Readers, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGibbs, Stuart. Spy School Goes North. First edition. Simon & Schuster Books for Young Readers, 2023.
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