Isnaini, Fitri, and Narwawi Pramudhiarta. “GEOGRAPHIC INFORMATION SYSTEM (GIS) FOR MAPPING OF DRUG ABUSE USING SPATIAL CORRELATION ANALYSIS IN NORTH SUMATRA PROVINCE”. Jurnal Pertahanan: Media Informasi Tentang Kajian Dan Strategi Pertahanan Yang Mengedepankan Identity, Nasionalism Dan Integrity, vol. 6, no. 3, Dec. 2020, pp. 416-28, doi:10.33172/jp.v6i3.879.