If you’ve never heard of Bren Brown, you’re missing out on some powerful motivation. She’s not only a five-time New York Times best-selling author, but she’s also an amazing public speaker ...

Nohria, Nitin, Boris Groysberg, and Linda-Eling Lee. "Employee Motivation: A Powerful New Model." HBS Centennial Issue Harvard Business Review 86, nos. 7/8 (July–August 2008): 78–84.