Gan, Shu-San. “Closed-Loop Supply Chain As an Agent of Sustainable Development”. Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri 17, no. 1 (June 30, 2015): 7-16. Accessed April 30, 2024. https://jurnalindustri.petra.ac.id/index.php/ind/article/view/19267.