Gopalakrishnan Udayakumar. (2016). What it takes to be a Leader with Passion. Notion Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGopalakrishnan Udayakumar. What It Takes to Be a Leader with Passion. Chennai: Notion Press, 2016.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGopalakrishnan Udayakumar. What It Takes to Be a Leader with Passion. Notion Press, 2016.
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