Eric Ries (2011). “The Lean Startup: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses”, p.56, Crown Business
Eric Ries (2011). “The Lean Startup: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses”, p.56, Crown Business
Eric Ries (2011). “The Lean Startup: How Today's Entrepreneurs Use Continuous Innovation to Create Radically Successful Businesses”, p.50, Crown Business