Viengxay Thammavong และ Puangthong Pawakapan. (2008) The socio-economic impacts of Lao-Thai informal border trade on people's livelihood and poverty reduction. Chulalongkorn University:ม.ป.ท.Viengxay Thammavong และ Puangthong Pawakapan. 2008. The socio-economic impacts of Lao-Thai informal border trade on people's livelihood and poverty reduction. ม.ป.ท.:Chulalongkorn University;Viengxay Thammavong และ Puangthong Pawakapan. The socio-economic impacts of Lao-Thai informal border trade on people's livelihood and poverty reduction. ม.ป.ท.:Chulalongkorn University, 2008. Print.