Oraphan Ritman และ Sumittra Suraratdecha. (2016) Needs analysis of english language skills for professional nurse: the context of asean economic community. Mahidol University:ม.ป.ท.Oraphan Ritman และ Sumittra Suraratdecha. 2016. Needs analysis of english language skills for professional nurse: the context of asean economic community. ม.ป.ท.:Mahidol University;Oraphan Ritman และ Sumittra Suraratdecha. Needs analysis of english language skills for professional nurse: the context of asean economic community. ม.ป.ท.:Mahidol University, 2016. Print.