J. H. Frans, Y. A. Messah, and N. T. Issu, “KAJIAN TARIF ANGKUTAN UMUM BERDASARKAN BIAYA OPERASIONAL KENDARAAN (BOK), ABILITY TO PAY (ATP) DAN WILLINGNESS TO PAY (WTP) DI KABUPATEN TTS”, JTS, vol. 5, no. 2, pp. 185–198, Sep. 2016.