Simamora, N. N., E. Istiyono, and I. Wilujeng. “Development of an Assessment Instrument to Measure High School Students’ Collaboration Skills in Physics Learning”. Jurnal Penelitian & Pengembangan Pendidikan Fisika, Vol. 10, no. 1, June 2024, pp. 39 -46, doi:10.21009/1.10104.