VALIDITAS E-MODUL BERBASIS WEBSITE PADA MATA KULIAH PADUAN SUARA: STUDI PENELITIAN PENGEMBANGAN. JIPTI [Internet]. 2024 Apr. 8 [cited 2026 Jun. 4];5(1):79-91. Available from: https://ejournal.ummuba.ac.id/index.php/JIPTI/article/view/1633