RYAN, J. (1960). Learning to swim is fun. The Ronald Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRYAN, Jack. Learning to Swim Is Fun. New York: The Ronald Press, 1960.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRYAN, Jack. Learning to Swim Is Fun. The Ronald Press, 1960.
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