Wolff, R. (2001). Robert Wolff's book of great workouts: Everything you need to know to vary your routine and keep you motivated. Contemporary Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wolff, Robert. Robert Wolff's Book of Great Workouts: Everything You Need to Know to Vary Your Routine and Keep You Motivated. Lincolnwood, Chicago, Ill: Contemporary Books, 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Wolff, Robert. Robert Wolff's Book of Great Workouts: Everything You Need to Know to Vary Your Routine and Keep You Motivated. Contemporary Books, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.