Mavianti, M. Harun, R. A. Putri, W. S. Agustin, and P. Andreani. “Efforts to Manage the Hidden Heaven of the World in Pamah Semelir Langkat-North Sumatra”. Indonesian Journal of Community Services Cel, vol. 1, no. 1, Apr. 2022, pp. 42-48, doi:10.70110/ijcsc.v1i1.6.