Walker, M., & West, S. (2017). Why we sleep: Unlocking the power of sleep and dreams (Unabridged.). Simon & Schuster Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Matthew, और Steve West. Why We Sleep: Unlocking the Power of Sleep and Dreams. Unabridged. New York: Simon & Schuster Audio, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWalker, Matthew, और Steve West. Why We Sleep: Unlocking the Power of Sleep and Dreams. Unabridged. Simon & Schuster Audio, 2017.
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