Suthep Nimsai and others. 2006. The study and analysis of economics cooperation for development of trade and investment in the Greater Mekong Sub-region (GMS). Chiang Rai:Mae Fah Luang University;

Suthep Nimsai and others. The study and analysis of economics cooperation for development of trade and investment in the Greater Mekong Sub-region (GMS). Chiang Rai:Mae Fah Luang University, 2006. Print.

Suthep Nimsai and others. (2006) The study and analysis of economics cooperation for development of trade and investment in the Greater Mekong Sub-region (GMS). Mae Fah Luang University:Chiang Rai.