Endang Indarini. Dampak Model Problem Based Learning Terhadap Keterampilan Abad 21 (4 C) di Sekolah Dasar. SW [Internet]. 2024 Jun. 19 [cited 2025 May 21];40(1):73-87. Available from: https://ejournal.uksw.edu/satyawidya/article/view/12237