Sonita SUM และ Thanapong Champahom;Sajjakaj Jomnonkwao;Vatanavongs Ratanavaraha. (2019) An Application of Importance-Performance Analysis (IPA) for Evaluating City Bus Service Quality in Cambodia. <i>International Journal of Building, Urban, Interior and Landscape Technology</i>, <i>13</i>, 55-66.Sonita SUM และ Thanapong Champahom;Sajjakaj Jomnonkwao;Vatanavongs Ratanavaraha. "An Application of Importance-Performance Analysis (IPA) for Evaluating City Bus Service Quality in Cambodia". International Journal of Building, Urban, Interior and Landscape Technology 13 (2019):55-66.Sonita SUM และ Thanapong Champahom;Sajjakaj Jomnonkwao;Vatanavongs Ratanavaraha. An Application of Importance-Performance Analysis (IPA) for Evaluating City Bus Service Quality in Cambodia. Thammasat Printing House:ม.ป.ท. 2019.