Macy, T., & Hutchison, B. (2015). The ultra mindset: An endurance champion's 8 core principles for success in business, sports, and life (Unabridged.). Recorded Books Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Macy, Travis, و Brian Hutchison. The Ultra Mindset: An Endurance Champion's 8 Core Principles for Success in Business, Sports, and Life. Unabridged. Prince Frederick: Recorded Books Inc., 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Macy, Travis, و Brian Hutchison. The Ultra Mindset: An Endurance Champion's 8 Core Principles for Success in Business, Sports, and Life. Unabridged. Recorded Books Inc., 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.