T. S. Melanie, J. . ’Ardhuha, M. Taufik, and A. Harjono, “Problem-Based Learning Assisted by Mobile Pocket Book in Mechanical Wave to Enhances Students’ Concepts Mastery and Creativity”, J. Pendidik. Fis. Teknol., vol. 9, no. 2, pp. 234–242, Dec. 2023.