Hardy, B. (2018). Willpower doesn't work: Discover the hidden keys to success (First Edition.). Hachette Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHardy, Benjamin. Willpower Doesn't Work: Discover the Hidden Keys to Success. First Edition. New York: Hachette Books, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHardy, Benjamin. Willpower Doesn't Work: Discover the Hidden Keys to Success. First Edition. Hachette Books, 2018.
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