Cooper, A. (2023). Astor: The rise and fall of an american fortune (Unabridged.). HarperAudio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCooper, Anderson. Astor: The Rise and Fall of an American Fortune. Unabridged. New York: HarperAudio, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCooper, Anderson. Astor: The Rise and Fall of an American Fortune. Unabridged. HarperAudio, 2023.
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