Hasanah, Naimah, et al. “ETHNOPHYSICAL INTEGRATION IN COOPERATIVE LEARNING BASED ON BATAK CULTURE TO IMPROVE GENERIC SKILLS OF SCIENCE (GSS) AND STUDENT TEAMWORK”. Jurnal Pendidikan Fisika, vol. 10, no. 1, June 2021, pp. 67-71, doi:10.22611/jpf.v10i1.14056.