Prapasri Thongtawepo และ Waranya Patarasuk. (1997) Impact of procurement deregulation on the Government Pharmaceutical Organization's products and structure. Chulalongkorn University.:ม.ป.ท.Prapasri Thongtawepo และ Waranya Patarasuk. 1997. Impact of procurement deregulation on the Government Pharmaceutical Organization's products and structure. ม.ป.ท.:Chulalongkorn University.;Prapasri Thongtawepo และ Waranya Patarasuk. Impact of procurement deregulation on the Government Pharmaceutical Organization's products and structure. ม.ป.ท.:Chulalongkorn University. 1997. Print.