Parinduri, M. A., A. Karim, and H. Lestari. “Main Values of Toba Muslim Batak Culture in Moral Education Perspective”. KARSA: Jurnal Sosial Dan Budaya Keislaman (Journal of Social and Islamic Culture) , Vol. 28, no. 1, June 2020, pp. 121-40, doi:10.19105/karsa.v28i1.2567.