Tuenjai Vithanvattana และ Preeyachat Uttamayodhin. (2009) Spa therapists' preferences to working in Thailand and abroad. Thammasat University:ม.ป.ท.Tuenjai Vithanvattana และ Preeyachat Uttamayodhin. 2009. Spa therapists' preferences to working in Thailand and abroad. ม.ป.ท.:Thammasat University;Tuenjai Vithanvattana และ Preeyachat Uttamayodhin. Spa therapists' preferences to working in Thailand and abroad. ม.ป.ท.:Thammasat University, 2009. Print.