Puspitasari, Mariana Diah, and Dedik Tri Istiantara. “Airport Railroad Service Kualanamu Elasticity (Airport Railink Service)”. Jurnal Perkeretaapian Indonesia (Indonesian Railway Journal), vol. 2, no. 1, Mar. 2018, pp. 22-33, https://doi.org/10.37367/jpi.v2i1.23.