Ronald MS Siburian, Tengku Irmayani, Heri Kusmanto. IMPLEMENTATION OF THE “JEMPUT SAMPAH TERIMA DUIT” (JUMPA MADU) WASTE COLLECTION APP TO PROMOTE CLEANLINESS IN LUBUK PAKAM SUBDISTRICT, DELI SERDANG REGENCY. MORFAI [Internet]. 2026 Jul. 4 [cited 2026 Jul. 4];6(4):5227-33. Available from: https://radjapublika.com/index.php/MORFAI/article/view/5674