Al Husaeni, D.F. et al. 2026. Differentiated Problem Based Learning Elevates Vocational Student Collaboration Skills: Pembelajaran Berbasis Masalah Berdiferensiasi Meningkatkan Kolaborasi Siswa Vokasi. Pedagogia : Jurnal Pendidikan. 15, 2 (Apr. 2026), 169–194. DOI:https://doi.org/10.21070/pedagogia.v15i2.1886.