WIJAYA, Y.; IRYANI, I. Validitas E-Modul Larutan Penyangga Berbasis Problem Based Learning (PBL) Terintegrasi Teaching at The Right Level (TaRL) Fase F Kelas XI. Entalpi Pendidikan Kimia, v. 5, n. 2, p. 10-17, 18 ago. 2024.