Duckworth, A. (2016). Grit: The power of passion and perseverance (Unabridged.). Simon & Schuster Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDuckworth, Angela. Grit: The Power of Passion and Perseverance. Unabridged. New York: Simon & Schuster Audio, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDuckworth, Angela. Grit: The Power of Passion and Perseverance. Unabridged. Simon & Schuster Audio, 2016.
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