Quan และ Hoang Manh. (1993) An analysis of farmers material life after the renovation process in Vietnam. Khon Kaen University,:ม.ป.ท.Quan และ Hoang Manh. 1993. An analysis of farmers material life after the renovation process in Vietnam. ม.ป.ท.:Khon Kaen University,;Quan และ Hoang Manh. An analysis of farmers material life after the renovation process in Vietnam. ม.ป.ท.:Khon Kaen University, 1993. Print.