APA (7e ed.) Bronvermelding

Walker, M. P. (2018). Why we sleep: The new science of sleep and dreams. Penguin Books.

Chicago (17e ed.) Bronvermelding

Walker, Matthew P. Why We Sleep: The New Science of Sleep and Dreams. UK: Penguin Books, 2018.

MLA (9e ed.) Bronvermelding

Walker, Matthew P. Why We Sleep: The New Science of Sleep and Dreams. Penguin Books, 2018.