Widyatni, D., Anugraha, P. T., Fadillah, Z. D., Juliar, E. and Taufik, M. (2025) “Traditional Public Transportation Service Levels of Middle City: A Systematic Literature Review : Tingkat Pelayanan Transportasi Umum Tradisional di Kota Menengah: Tinjauan Literatur Sistematis”, RIGGS: Journal of Artificial Intelligence and Digital Business, 4(2), pp. 5293–5302. doi: 10.31004/riggs.v4i2.1416.