Tapado, B. M. ., and M. S. R. . Gregorio. “Level of Efficiency of the Information Technology Professional Subjects Instruction at the Catanduanes State University for School Year 2015-2016”. International Journal of Learning, Teaching and Educational Research, vol. 15, no. 4, Apr. 2016, pp. 75-81, http://www.ijlter.net/index.php/ijlter/article/view/946.