Freedman, R., & Washington, S. (2005). The voice that challenged a nation: Marian anderson and the struggle for equal rights (Unabridged.). Recorded Books Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Freedman, Russell, و Sharon Washington. The Voice That Challenged a Nation: Marian Anderson and the Struggle for Equal Rights. Unabridged. Prince Frederick: Recorded Books Inc., 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Freedman, Russell, و Sharon Washington. The Voice That Challenged a Nation: Marian Anderson and the Struggle for Equal Rights. Unabridged. Recorded Books Inc., 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.