1. The design thinking toolbox: a guide to mastering the most popular and valuable innovation methods Lewrick, Michael, Hoboken, New Jersey : Wiley, [2020] DSA111
2. The systems thinker: essential thinking skills for solving problems, managing chaos, and creating lasting solutions in a complex world Rutherford, Albert, [Place of publication not identified] ] : [Self published], 2018. DSA111
