Suyanta, Suyanta. 2020. “USING THE PROBLEM BASE LEARNING (PBL) LEARNING MODEL TO IMPROVE CRITICAL THINKING ABILITY IN CHEMICAL LEARNING ABOUT TERMOCYMIA FOR STUDENTS IN CLASS XI MIPA 3 SMAN 1 BAMBANGLIPURO BANTUL”. Ideguru: Jurnal Karya Ilmiah Guru 5 (1), 109-14. https://doi.org/10.51169/ideguru.v5i1.119.