Howard, T., & Jackson, J. (2014). The keeper: A life of saving goals and achieving them (Unabridged.).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHoward, Tim, और JD Jackson. The Keeper: A Life of Saving Goals and Achieving Them. Unabridged. 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHoward, Tim, और JD Jackson. The Keeper: A Life of Saving Goals and Achieving Them. Unabridged. 2014.
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