Charoenchai Ngoenprasopsuk และ Pattama Sappapan. (2008) Factors influencing purchasing decisions about clinical diagnostic products in medical laboratories. Thammasat University:ม.ป.ท.Charoenchai Ngoenprasopsuk และ Pattama Sappapan. 2008. Factors influencing purchasing decisions about clinical diagnostic products in medical laboratories. ม.ป.ท.:Thammasat University;Charoenchai Ngoenprasopsuk และ Pattama Sappapan. Factors influencing purchasing decisions about clinical diagnostic products in medical laboratories. ม.ป.ท.:Thammasat University, 2008. Print.