Elkind, D. (2007). The power of play: How spontaneous, imaginative activities lead to happier, healthier children. Da Capo Lifelong.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रElkind, David. The Power of Play: How Spontaneous, Imaginative Activities Lead to Happier, Healthier Children. Cambridge, MA: Da Capo Lifelong, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रElkind, David. The Power of Play: How Spontaneous, Imaginative Activities Lead to Happier, Healthier Children. Da Capo Lifelong, 2007.
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