Riyadi, S., N. Adilah, and S. Suwardi. “IMPROVING CRITICAL THINKING ABILITY ISLAMIC RELIGIOUS EDUCATION THROUGH PROBLEM BASED INSTRUCTION (PBI) METHODS UNIVERSITY OF LAW EKASAKTI”. INTERNATIONAL CONFERENCE ON GLOBAL EDUCATION, Apr. 2022, pp. 454-62, https://ejurnal.unespadang.ac.id/index.php/ICGE/article/view/127.