Epstein, R., & Rogers, J. (2001). The big book of motivation games: Quick, fun activities for energizing people at work and at home. McGraw-Hill.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Epstein, Robert, و Jessica Rogers. The Big Book of Motivation Games: Quick, Fun Activities for Energizing People at Work and at Home. New York: McGraw-Hill, 2001.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Epstein, Robert, و Jessica Rogers. The Big Book of Motivation Games: Quick, Fun Activities for Energizing People at Work and at Home. McGraw-Hill, 2001.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.