Tagsina Sripracha และ Namtip Pingkarawat. (2005) Intelligibility of English speech between Singaporean and Thai English Speakers. Chulalongkorn University:ม.ป.ท.Tagsina Sripracha และ Namtip Pingkarawat. 2005. Intelligibility of English speech between Singaporean and Thai English Speakers. ม.ป.ท.:Chulalongkorn University;Tagsina Sripracha และ Namtip Pingkarawat. Intelligibility of English speech between Singaporean and Thai English Speakers. ม.ป.ท.:Chulalongkorn University, 2005. Print.