EFEKTIVITAS PENGGUNAAN BUKU SAKU PENGOLAHAN LIMBAH PLASTIK DI SEKOLAH DASAR. jpkm [Internet]. 2019 Jul. 24 [cited 2026 Nov. 2];11(2):231-40. Available from: https://jurnal.unikastpaulus.ac.id/index.php/jpkm/article/view/765