Gopalakrishnan Udayakumar. (2016). What it takes to be a Leader with Passion. Notion Press.
Chicago-referens (17:e uppl.)Gopalakrishnan Udayakumar. What It Takes to Be a Leader with Passion. Chennai: Notion Press, 2016.
MLA-referens (9:e uppl.)Gopalakrishnan Udayakumar. What It Takes to Be a Leader with Passion. Notion Press, 2016.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.