Endarto, D. P., R. Wangsaputra, and N. F. Sa’idah. “System Design for a Sustainable Returned Materials Management System at PT PLN UID East and North Kalimantan”. ITB Graduate School Conference, vol. 5, no. 1, Oct. 2025, pp. 141-55, https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/676.