Bell, U., & Borges, R. (2017). Present at the creation: My life in the NFL and the rise of America's game. University of Nebraska Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bell, Upton, و Ron Borges. Present at the Creation: My Life in the NFL and the Rise of America's Game. Lincoln: University of Nebraska Press, 2017.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bell, Upton, و Ron Borges. Present at the Creation: My Life in the NFL and the Rise of America's Game. University of Nebraska Press, 2017.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.