Mujianti, Yunita, 		Umamah, Nurul, 		Marjono, Marjono, 		Sumardi, Sumardi, AND 		Surya, Riza Afita.
" 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], Volume 5 Number 2 (21 December 2021)