Troyer และผู้แต่งคนอื่นๆ. (2007) Dialogue in world English literatures : a comparison of parent-child conversations in short stories from three varieties of English. Chulalongkorn University:ม.ป.ท.Troyer และผู้แต่งคนอื่นๆ. 2007. Dialogue in world English literatures : a comparison of parent-child conversations in short stories from three varieties of English. ม.ป.ท.:Chulalongkorn University;Troyer และผู้แต่งคนอื่นๆ. Dialogue in world English literatures : a comparison of parent-child conversations in short stories from three varieties of English. ม.ป.ท.:Chulalongkorn University, 2007. Print.