Berutu, N., M. R. S. Damanik, and M. Kabatiah. “The Development of Cross-faculty/University Integrated Social Science Learning Model in the Faculty of Social Science, Universitas Negeri Medan”. Randwick International of Education and Linguistics Science Journal, Vol. 2, no. 2, June 2021, pp. 215-21, doi:10.47175/rielsj.v2i2.262.