Way Quotes - Page 332
Mike Michalowicz (2008). “The Toilet Paper Entrepreneur: The Tell-it-like-it-is Guide to Cleaning Up in Business, Even If You are at the End of Your Roll”, p.119, Toilet Paper Entrepreneur
Mihaly Csikszentmihalyi (1996). “Creativity: Flow and the Psychology of Discovery and Invention”, Harpercollins