Silitubun, E. et al. 2024. The Effectiveness of Case-Based Learning to Improve the Collaboration and Communication Skills of Early Childhood Education Students. Jurnal Obsesi : Jurnal Pendidikan Anak Usia Dini. 8, 6 (Nov. 2024), 1385–1394. DOI:https://doi.org/10.31004/obsesi.v8i6.6233.