Tarigan, Elsa, 		Nurfajriani, Nurfajriani, AND 		Muchtar, Zainuddin.
" PENGEMBANGAN DAN VALIDITAS E-MODUL INOVATIF NONLOGAM OKSIGEN DAN SULFUR BERBASIS KKNI" <em>PROSIDING SEMINAR NASIONAL KIMIA</em> [Online], Volume 1 Number 1 (12 July 2023)