Gardner, M. (1963). Martin Gardner's Sixth book of mathematical games from Scientific American (NA.). W.H. Freeman and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGardner, Martin. Martin Gardner's Sixth Book of Mathematical Games from Scientific American. NA. San Francisco: W.H. Freeman and Company, 1963.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGardner, Martin. Martin Gardner's Sixth Book of Mathematical Games from Scientific American. NA. W.H. Freeman and Company, 1963.
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