1. Abdulreza, Ghasempour el all. (2013).The relationship between operataional financial ratios and Firm's abnormal stock Return. Research Journal of Applied Sciences, Engineering and Technology.,6(15).Maxwel Scientificorganization. http://maxwellsci.com/jp/abstract.
2. Ali Talip Akpinar, et al. (2014). Intellectual Capital. Research paper. Kocaeli University Institute of Social Science, Turkey.
3. Ante Pulic .(1998). Measuring the Performance of Intellectual Potential in Knowledge Economy. Presented at the 2 nd Mc.Master Word Congress on Measuring and managing Intellectual Capital by the Austrian Team for Intellectual Potential. https://xa.yimg.com/kq/groups.
4. Baroroh, Niswah . (2013). Analysis on the influence of intelIectual capital on financial performance Manufacturing. Jurnal Dinamika Akuntansi, Vol. 5, No. 2, Sept. 2013, pp. 172-182. Universitas Negeri Semarang.
5. Bontis, N.,Keow,W.C.C., & Richardson, S. (2000). Intellectual Capital and business performance in Malasyan industries. Journal of intellectual Capital, 1 (1),pp 85-100. http://www.business.mcmaster.ca.