Vincent, I., & Ivary, L. (2022). Overture of hope: Two sisters' daring plan that saved opera's jewish stars from the third reich (Unabridged.). Blackstone Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Vincent, Isabel, و Liisa Ivary. Overture of Hope: Two Sisters' Daring Plan That Saved Opera's Jewish Stars from the Third Reich. Unabridged. Ashland: Blackstone Publishing, 2022.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Vincent, Isabel, و Liisa Ivary. Overture of Hope: Two Sisters' Daring Plan That Saved Opera's Jewish Stars from the Third Reich. Unabridged. Blackstone Publishing, 2022.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.