Komarudin Afz F. Layanan Calistung Terhadap Anak Pemulung (Calistung Learning Service For The Children Who Work As A Scavenger). JPKM [Internet]. 2012 Jul. 27 [cited 2025 Jan. 31];2(1):29-3. Available from: http://ojs.uninus.ac.id/index.php/JPKM/article/view/29