Walker, M. P. (2017). Why we sleep: Unlocking the power of sleep and dreams (First Scribner hardcover edition.). Scribner, an imprint of Simon & Schuster, Inc..

Walker, Matthew P. Why We Sleep: Unlocking the Power of Sleep and Dreams. First Scribner hardcover edition. New York: Scribner, an imprint of Simon & Schuster, Inc., 2017.

Walker, Matthew P. Why We Sleep: Unlocking the Power of Sleep and Dreams. First Scribner hardcover edition. Scribner, an imprint of Simon & Schuster, Inc., 2017.