Tauran, T., M. F. Ma’ruf, and S. Suyatno. “Social Entrepreneurship in Waste Management: Surabaya’s Experience”. Journal of Governance and Development (JGD), vol. 11, Dec. 2015, pp. 53-66, https://e-journal.uum.edu.my/index.php/jgd/article/view/13508.