Ricardo และ Edgardo M. (1995) Awareness of cigarette pack warning labels among ex-smokers and current smokers in Suphan Buri province, Thailand. Mahidol University,:ม.ป.ท.Ricardo และ Edgardo M. 1995. Awareness of cigarette pack warning labels among ex-smokers and current smokers in Suphan Buri province, Thailand. ม.ป.ท.:Mahidol University,;Ricardo และ Edgardo M. Awareness of cigarette pack warning labels among ex-smokers and current smokers in Suphan Buri province, Thailand. ม.ป.ท.:Mahidol University, 1995. Print.