Rachman, R. A., and Y. Okvitasari. “Utilization of Waste from Glass and Plastic Bottles of Mineral Water As a Hydroponic Planting Media”. Prosiding Pengembangan Masyarakat Mandiri Berkemajuan Muhammadiyah (Bamara-Mu), vol. 1, no. 1, Sept. 2021, pp. 79-85, https://proceeding.mbunivpress.or.id/index.php/bamara/article/view/66.