Romano, Bettymae, Riena Samudio, Matt Rojan Paulino, Donna Palacios, Michael Angelo Toca, and Geovannie Bernales Jr. 2020. “Assessment on Level of Effectiveness of Using Audio-Visuals in Teaching Science”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research 2 (1). https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/1679.