Suporn Leongkamchorn และ Ketkanda Jaturongkachoke. (2010) Speech act analysis of British and American poetry. National Institute of Development Administration:ม.ป.ท.Suporn Leongkamchorn และ Ketkanda Jaturongkachoke. 2010. Speech act analysis of British and American poetry. ม.ป.ท.:National Institute of Development Administration;Suporn Leongkamchorn และ Ketkanda Jaturongkachoke. Speech act analysis of British and American poetry. ม.ป.ท.:National Institute of Development Administration, 2010. Print.