Prapasiri Srisitanon และ Preeyachat Uttamayodhin. (2009) Intercultural communication problems of Thai employees at Precious Shipping Public Company Limited (PSL). Language Institute, Thammasat University,:ม.ป.ท.Prapasiri Srisitanon และ Preeyachat Uttamayodhin. 2009. Intercultural communication problems of Thai employees at Precious Shipping Public Company Limited (PSL). ม.ป.ท.:Language Institute, Thammasat University,;Prapasiri Srisitanon และ Preeyachat Uttamayodhin. Intercultural communication problems of Thai employees at Precious Shipping Public Company Limited (PSL). ม.ป.ท.:Language Institute, Thammasat University, 2009. Print.