Pratami, Devi, Asti Amalia Nur Fajrillah, and Tien Fabrianti Kusumasari. 2018. “Content Visualization: An Evaluation of PowerPoint Effectiveness As a Learning Tool for Students”. International Journal of Engineering & Technology 7 (2.29): 840-44. https://doi.org/10.14419/ijet.v7i2.29.14268.