Suprapto Budinugroho และ Tanit Tongthong. (2005) Comparative study of implementation of online bidding for contractor selection in government construction projects. Chulalongkorn University:ม.ป.ท.Suprapto Budinugroho และ Tanit Tongthong. 2005. Comparative study of implementation of online bidding for contractor selection in government construction projects. ม.ป.ท.:Chulalongkorn University;Suprapto Budinugroho และ Tanit Tongthong. Comparative study of implementation of online bidding for contractor selection in government construction projects. ม.ป.ท.:Chulalongkorn University, 2005. Print.