Kunadi, Novika Rahmawati, and Agustin Marsely Prahestie Abdul Rokhman. “The Policy Analysis For Reducing The Use Of Plastic Bags In Surabaya Using A Problem Trees Analysis Approach”. International Conference on Multidisciplinary Issues (INCOMI) 2, no. 1 (July 22, 2024): 532–541. Accessed October 31, 2025. https://journal.unej.ac.id/KONAMI/article/view/958.