Hefni Effendi, S. C. R. K. S. S. D. T. “Assessment of Land Use Land Cover Changes and Their Impact to Groundwater Quality Index in Kendari City - Indonesia”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Feb. 2020, pp. 3441 -52, http://sersc.org/journals/index.php/IJAST/article/view/4788.