توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Littlehales, N. (2018). Sleep: The myth of 8 hours, the power of naps ... and the new plan to recharge your body and mind. Da Capo Lifelong.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Littlehales, Nick. Sleep: The Myth of 8 Hours, the Power of Naps ... and the New Plan to Recharge Your Body and Mind. New York, NY: Da Capo Lifelong, 2018.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Littlehales, Nick. Sleep: The Myth of 8 Hours, the Power of Naps ... and the New Plan to Recharge Your Body and Mind. Da Capo Lifelong, 2018.