Fehrman, C. (2020). Author in chief: The untold story of our presidents and the books they wrote (First Avid Reader Press hardcover edition.). Avid Reader Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Fehrman, Craig. Author in Chief: The Untold Story of Our Presidents and the Books They Wrote. First Avid Reader Press hardcover edition. New York: Avid Reader Press, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Fehrman, Craig. Author in Chief: The Untold Story of Our Presidents and the Books They Wrote. First Avid Reader Press hardcover edition. Avid Reader Press, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.