Cooper, A., & Howe, K. (2023). Astor: The rise and fall of an American fortune (First Harper large print edition.). Harper Large Print.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCooper, Anderson, और Katherine Howe. Astor: The Rise and Fall of an American Fortune. First Harper large print edition. New York: Harper Large Print, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCooper, Anderson, और Katherine Howe. Astor: The Rise and Fall of an American Fortune. First Harper large print edition. Harper Large Print, 2023.
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