., Elisa, and Amin Fauzi. “IMPROVING THE UNDERSTANDING OF THE CONCEPT AND STUDENT LEARNING ACTIVITIES USED COOPERATIVE LEARNING MODEL TYPE STAD BASED STRUCTURED LKS”. Jurnal Pendidikan Fisika, vol. 2, no. 1, June 2013, pp. 43-50, doi:10.22611/jpf.v2i1.4336.