Yusoff, R. B. M., A. G. Kazi, M. M. K. Arisar, F. Jamil, and S. S. Hishan. “Role of Integrity in the Success of Freelancing and Entrepreneurship: A Conceptual Review”. International Review of Management and Marketing, vol. 6, no. 4S, May 2016, pp. 250-4, https://econjournals.com/index.php/irmm/article/view/2495.