Simbolon AM, Ayu Purba TS, Simbolon RD, Sianipar YS, Putri Aruan HMG. Tahap Tindak Lanjut (Follow-Up). ecotal [Internet]. 2025Jul.8 [cited 2025Aug.1];6(2):1438-46. Available from: https://ojs.stieamkop.ac.id/index.php/ecotal/article/view/2802