Al-Hajaya, K., M. S. Altarawneh, and B. Altarawneh. “Intellectual Capital Disclosure by Listed Companies in Jordan: A Comparative Inter-Sector Analysis”. International Review of Management and Marketing, vol. 9, no. 1, Jan. 2019, pp. 109-16, https://www.econjournals.com/index.php/irmm/article/view/7381.