Douglas, S. (2017). 100 things you can do to stay fit and healthy: Simple steps to better your body and improve your mind. Skyhorse Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Douglas, Scott. 100 Things You Can Do to Stay Fit and Healthy: Simple Steps to Better Your Body and Improve Your Mind. New York: Skyhorse Publishing, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Douglas, Scott. 100 Things You Can Do to Stay Fit and Healthy: Simple Steps to Better Your Body and Improve Your Mind. Skyhorse Publishing, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.