Loehr, J. E., & Schwartz, T. (2003). The power of full engagement: Managing energy, not time, is the key to performance and personal renewal. Free Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Loehr, James E., و Tony Schwartz. The Power of Full Engagement: Managing Energy, Not Time, Is the Key to Performance and Personal Renewal. New York: Free Press, 2003.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Loehr, James E., و Tony Schwartz. The Power of Full Engagement: Managing Energy, Not Time, Is the Key to Performance and Personal Renewal. Free Press, 2003.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.