Butler-Bowdon, T. (2004). 50 success classics: Winning wisdom for work and life from 50 landmark books. Nicholas Brealey Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रButler-Bowdon, Tom. 50 Success Classics: Winning Wisdom for Work and Life from 50 Landmark Books. London ; Yarmouth, Me.: Nicholas Brealey Pub., 2004.
एमएलए (8वां संस्करण) प्रशस्ति पत्रButler-Bowdon, Tom. 50 Success Classics: Winning Wisdom for Work and Life from 50 Landmark Books. Nicholas Brealey Pub., 2004.
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