Pramitha, Dewi Ayu, Tito Wasito, and Imam Ozali. 2018. “Strategy Formulation to Increase the Passengers of Singapore Airlines”. Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) 5 (2):141-52. https://doi.org/10.54324/j.mtl.v5i2.240.