“Optimization of Laundry Wastewater Treatment Using Zeolite and Activated Carbon Media in a Compact Dual-Tube Combination Filter: Optimalisasi Pengolahan Air Limbah Laundry menggunakan Media Zeolit dan Karbon Aktif dalam Filter Kombinasi Dua Tabung Kompak” (2025) SPECTA Journal of Technology, 9(3), pp. 303–314. doi:10.35718/specta.v9i3.8481751.