Masruchan Masruchan, & Rifa Nurmilah. (2025). The Effectiveness of E-Book Learning Media on Business Communication Material for Students of SMK PGRI 1 Jombang. Jurnal Sosial Humaniora Dan Pendidikan, 5(1), 286–296. https://doi.org/10.55606/inovasi.v5i1.5429