Adi, D. P. and Masruri, M. S. (2018) “Keefektifan pendekatan saintifik model problem based learning, problem solving, dan inquiry dalam pembelajaran IPS”, Harmoni Sosial: Jurnal Pendidikan IPS, 4(2), pp. 142–152. doi: 10.21831/hsjpi.v4i2.9826.