“THE VALIDITY AND FEASIBILITY OF A HANDBOOK ON THE PROPERTIES OF LIGHT AND REFLECTIONS INTEGRATED WITH 1-SIDE HOLOGRAM LEARNING MEDIA FOR MIDDLE SCHOOL STUDENTS”. SPEKTRA: Jurnal Kajian Pendidikan Sains 11, no. 1 (April 30, 2025): 10–21. Accessed November 27, 2025. https://ojs.unsiq.ac.id/index.php/spektra/article/view/8841.