Friedman, G., & Turk, B. (2020). The storm before the calm: America's discord, the coming crisis of the 2020s, and the triumph beyond (Unabridged.). Random House Audio.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Friedman, George, و Bruce Turk. The Storm Before the Calm: America's Discord, the Coming Crisis of the 2020s, and the Triumph Beyond. Unabridged. New York: Random House Audio, 2020.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Friedman, George, و Bruce Turk. The Storm Before the Calm: America's Discord, the Coming Crisis of the 2020s, and the Triumph Beyond. Unabridged. Random House Audio, 2020.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.