Ulfa, Z.M. and Rosidin, U. 2024. Development of Instrument Soft Skill Assessment in Problem-Based Learning to Improve Students’ Collaboration Skills, Communication Skills, and Social Skills. Jurnal Penelitian Pendidikan IPA. 10, 7 (Jul. 2024), 3681–3688. DOI:https://doi.org/10.29303/jppipa.v10i7.7545.