Varisa Titanantabutr และ Kanchana Prapphal. (2010) Computer-mediated simulation test as a diagnostic tool in assessing communicative ability of tour guide trainees. Chulalongkorn University:ม.ป.ท.Varisa Titanantabutr และ Kanchana Prapphal. 2010. Computer-mediated simulation test as a diagnostic tool in assessing communicative ability of tour guide trainees. ม.ป.ท.:Chulalongkorn University;Varisa Titanantabutr และ Kanchana Prapphal. Computer-mediated simulation test as a diagnostic tool in assessing communicative ability of tour guide trainees. ม.ป.ท.:Chulalongkorn University, 2010. Print.