Nguyen และ Thi Hai. (1998) Income differentials among different types of migrants and non-migrants in Ho Chi Minh City, Vietnam. Mahidol University,:ม.ป.ท.Nguyen และ Thi Hai. 1998. Income differentials among different types of migrants and non-migrants in Ho Chi Minh City, Vietnam. ม.ป.ท.:Mahidol University,;Nguyen และ Thi Hai. Income differentials among different types of migrants and non-migrants in Ho Chi Minh City, Vietnam. ม.ป.ท.:Mahidol University, 1998. Print.