1. Bustami R. Between Hard skills and soft skills. 2008. Available in http://www.infocomcare/. accessed on February 12, 2012.
2. Guidelines the implementation of Accountancy Profession Education (APE), Indonesian Institute of Accountants, 2009.
3. Listyani E. “Development of soft skills of students through lectures on prospective teachers majoring in mathematics education”. Faculty UNY. 2009.
4. Magazine accountant Indonesia edition no. 17/year III/June 2009.
5. Magazine accountant Indonesia edition no. 19/year III/August 2009.