Phillips, H. (2011). And yet they were happy. Leapfrog Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhillips, Helen. And yet They Were Happy. Teaticket, Mass.: Leapfrog Press, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPhillips, Helen. And yet They Were Happy. Leapfrog Press, 2011.
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