Khotami, Muhamad Habil, et al. “The Needs Analysis of the Electronic Student Worksheets (e-LKPD) Based on Discovery Learning for the Topic of Traveling Waves in High School ”. Jurnal Pendidikan Fisika Dan Teknologi, vol. 9, no. 1, June 2023, pp. 163-70, doi:10.29303/jpft.v9i1.5223.