P. T. . Khaimanee, S. . Sayapat, S. . Audmuangpiea, W. . Sopajorn, and S. . Nonmaung, “Efficiency on Service of Samran Sub-District Subdistrict Municipality, Mueang Khon Kaen District, Khon Kaen Province”, dhammathas, vol. 20, no. 3, pp. 121–132, Sep. 2020.