Busba Tonthong. (1991) An analysis of communicative functions and grammatical forms of headlines in tourism advertisement in English printed media from 1986-1988. Mahidol University,:ม.ป.ท.Busba Tonthong. 1991. An analysis of communicative functions and grammatical forms of headlines in tourism advertisement in English printed media from 1986-1988. ม.ป.ท.:Mahidol University,;Busba Tonthong. An analysis of communicative functions and grammatical forms of headlines in tourism advertisement in English printed media from 1986-1988. ม.ป.ท.:Mahidol University, 1991. Print.