N. Khaira, Y. Yusrizal, A. Gani, M. Syukri, E. Elisa, and E. Evendi, “Development of Student Worksheets Based on Comics to Improve Students’ Motivation and Learning Outcomes on Material Vibration, Waves and Sound”, jppipa, pendidikan ipa, fisika, biologi, kimia, vol. 6, no. 2, pp. 143–151, Jun. 2020.