Sepadyati, N. 2019. An Exploration of Risks Involved in Managing Supplier Portfolio in Multinational Companies Operating in Indonesia. Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri. 21, 2 (Dec. 2019), 79-90. DOI:https://doi.org/10.9744/jti.21.2.79-90.