Pholboon, B., S. Petsangsri, T. Sovajassatakul, and J. Sitthiworachart. “The Development of Stem Education on Multimedia Applications for Presentations for Vocational Certificate”. Scholar: Human Sciences, vol. 10, no. 2, Dec. 2018, p. 316, http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/3337.