Panwalee Primkajeepong. 2007. Customer satisfaction with work permit application services at the Office of Foreign Workers Administration. Bangkok:Thammasat University;
Panwalee Primkajeepong. (2007) Customer satisfaction with work permit application services at the Office of Foreign Workers Administration (รายงานผลงานวิจัย). Thammasat University:Bangkok.
Panwalee Primkajeepong. Customer satisfaction with work permit application services at the Office of Foreign Workers Administration. Bangkok:Thammasat University, 2007.
Panwalee Primkajeepong. (2007) Customer satisfaction with work permit application services at the Office of Foreign Workers Administration (รายงานผลงานวิจัย). Thammasat University:Bangkok.