Handoko, A. . Wahyu Pratama, Y. . Seta Anggara, H. Wan Ibnu, and L. Sutomo Putra. “Analysis of Effectiveness of Gapeka Implementation and Minimum Service Standard in PT KAI Regional II Division, West Sumatera”. Airman: Jurnal Teknik Dan Keselamatan Transportasi, vol. 3, no. 1, June 2020, pp. 9-15, doi:10.46509/ajtk.v3i1.150.