Tanjung, Rahmadani. “DEVELOPMENT OF SOCIAL SKILLS BASED IPS TEACHING MATERIALS FOR CLASS IV PRIMARY SCHOOL 060912 MEDAN DENAI”. REKOGNISI : Jurnal Pendidikan Dan Kependidikan (E-ISSN 2599-2260), vol. 4, no. 1, June 2019, pp. 83-94, https://jurnal.unusu.ac.id/index.php/rekognisi/article/view/120.