Pornladda Boonjun และ Valaikanya Plasai. (2002) Quality of service and customer satisfaction towards health care services at the medical outpatient department (OPD MED), Bamrasnaradura institute, 2003. Chulalongkorn University:ม.ป.ท.Pornladda Boonjun และ Valaikanya Plasai. 2002. Quality of service and customer satisfaction towards health care services at the medical outpatient department (OPD MED), Bamrasnaradura institute, 2003. ม.ป.ท.:Chulalongkorn University;Pornladda Boonjun และ Valaikanya Plasai. Quality of service and customer satisfaction towards health care services at the medical outpatient department (OPD MED), Bamrasnaradura institute, 2003. ม.ป.ท.:Chulalongkorn University, 2002. Print.