Mujianti, Yunita, Nurul Umamah, Marjono Marjono, Sumardi Sumardi, & Riza Afita Surya.
" The Difference of Problem Based Learning Models &amp; Substitution Augmentation Modification Redefinition Models on The Critical Thinking and Learning Outcomes." <em>JURNAL HISTORICA</em> [Online], 5.2 (2021): 183-203. Web.  4 May. 2024