Usman Kurniawan, M., Soejoto, A., & Soesatyo, Y. (2019). THE CAUSAL RELATIONSHIP BETWEEN EDUCATION LEVEL, INCOME, UNEMPLOYMENT, AND POVERTY IN THE DISTRICT OF SUMENEP PERIOD 2003-2012. Journal of Contemporary Issues and Thought, 5, 99–118. Retrieved from https://ojs.upsi.edu.my/index.php/JCIT/article/view/1026