Khaira, Ulfa, and Yerimadesi Yerimadesi. “Validitas E-Modul Kimia Unsur Berbasis Guided Discovery Learning Untuk Kelas XII SMA/ MA”. Entalpi Pendidikan Kimia 2, no. 1 (February 28, 2021): 47-56. Accessed July 5, 2024. http://entalpipendidikan.ppj.unp.ac.id/index.php/epk/article/view/124.