Pholboon, B., Petsangsri, S., Sovajassatakul, T., & Sitthiworachart, J. (2018). The Development of Stem Education on Multimedia Applications for Presentations for Vocational Certificate. Scholar: Human Sciences, 10(2), 316. Retrieved from http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/3337