Pham และ Van Dai. (1999) Preventive behavior on hypertension among 40 years old and above population in Chauthanh district, Cantho province, Vietnam. Mahidol University,:ม.ป.ท.Pham และ Van Dai. 1999. Preventive behavior on hypertension among 40 years old and above population in Chauthanh district, Cantho province, Vietnam. ม.ป.ท.:Mahidol University,;Pham และ Van Dai. Preventive behavior on hypertension among 40 years old and above population in Chauthanh district, Cantho province, Vietnam. ม.ป.ท.:Mahidol University, 1999. Print.