Trần, Thị Lệ Thủy Improving the pronunciation of English fricatives by using computer software - Ho Chi Minh City University of Social sciences and Humanities (National University of Ho Chi Minh City) 2012 - 139 p. 30 cm LV 339 Subjects--Topical Terms: Tiếng Anh--Cách phát âm Dewey Class. No.: 420.07 / I-34