Narumol Ruenwai. 1995. Study of discourse at the sentence level in research articles in the field of chemical engineering. Faculty of Graduate Studies, Mahidol University;
Narumol Ruenwai. (1995) Study of discourse at the sentence level in research articles in the field of chemical engineering . Mahidol University/Bangkok.
Narumol Ruenwai. Study of discourse at the sentence level in research articles in the field of chemical engineering. . Bangkok:Mahidol University, 1995.
Narumol Ruenwai. (1995) Study of discourse at the sentence level in research articles in the field of chemical engineering . Mahidol University/Bangkok.