Vincent, I. (2022). Overture of hope: Two sisters' daring plan that saved opera's Jewish stars from the Third Reich. Regnery History.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVincent, Isabel. Overture of Hope: Two Sisters' Daring Plan That Saved Opera's Jewish Stars from the Third Reich. Washington, DC: Regnery History, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVincent, Isabel. Overture of Hope: Two Sisters' Daring Plan That Saved Opera's Jewish Stars from the Third Reich. Regnery History, 2022.
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