Wannana Boonyakarn. (1990) A survey of current practices of teaching English listening in private universities and colleges in Thailand in the academic year 1990-1991. Mahidol University,:ม.ป.ท.Wannana Boonyakarn. 1990. A survey of current practices of teaching English listening in private universities and colleges in Thailand in the academic year 1990-1991. ม.ป.ท.:Mahidol University,;Wannana Boonyakarn. A survey of current practices of teaching English listening in private universities and colleges in Thailand in the academic year 1990-1991. ม.ป.ท.:Mahidol University, 1990. Print.