Diocton, R. C., R. B. Celmar, D. A. Mabonga, R. J. T. Severo, A. D. Garcia, D. G. Taon, and F. R. de Guzman. Journal of Academic Research, Vol. 2, no. 4, July 2017, http://ojs.ssu.edu.ph/index.php/JAR/article/view/23.