Hollis, D. (2021). Built through courage: Face your fears to live the life you were meant for. HarperCollins Leadership, an imprint of HarperCollins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHollis, Dave. Built Through Courage: Face Your Fears to Live the Life You Were Meant for. New York: HarperCollins Leadership, an imprint of HarperCollins, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHollis, Dave. Built Through Courage: Face Your Fears to Live the Life You Were Meant for. HarperCollins Leadership, an imprint of HarperCollins, 2021.
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