Nattida Yuwanitchayakhul และ Sathirakorn Pongpanich. (2003) Opinions of providers and customers toward risk in anesthesia, Maharaj Nakhon Si Thammarat Hospital. Chulalongkorn University:ม.ป.ท.Nattida Yuwanitchayakhul และ Sathirakorn Pongpanich. 2003. Opinions of providers and customers toward risk in anesthesia, Maharaj Nakhon Si Thammarat Hospital. ม.ป.ท.:Chulalongkorn University;Nattida Yuwanitchayakhul และ Sathirakorn Pongpanich. Opinions of providers and customers toward risk in anesthesia, Maharaj Nakhon Si Thammarat Hospital. ม.ป.ท.:Chulalongkorn University, 2003. Print.