Billa, Az Zahra Salsa, Eko Priyanto, and Ratna Kartikawati. 2024. “The Effectiveness of Problem Based Learning Model on Critical Thinking Skills on the Topic of Appreciating the Environment and Local Culture”. Proceedings Series on Social Sciences & Humanities 18 (September):72-77. https://doi.org/10.30595/pssh.v18i.1228.