Vidal-López, Joaquín. “The Double Path of Light in Ancient Times: Lessons for Science Educational Practice”. International Journal of Theory and Application in Elementary and Secondary School Education 2, no. 1 (April 30, 2020): 21–28. Accessed September 19, 2024. https://jurnal-fkip.ut.ac.id/index.php/ijtaese/article/view/68.