Walker, M. P. (2017). Why we sleep: Unlocking the power of sleep and dreams (First Scribner hardcover edition.). Scribner.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Matthew P. Why We Sleep: Unlocking the Power of Sleep and Dreams. First Scribner hardcover edition. New York: Scribner, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWalker, Matthew P. Why We Sleep: Unlocking the Power of Sleep and Dreams. First Scribner hardcover edition. Scribner, 2017.
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