O'Brien-Kelly และผู้แต่งคนอื่นๆ. (2006) The role of natural resources in the Khmer Rouge-royal government of Cambodia peace negotiations and reinegration process. Chulalongkorn University:ม.ป.ท.O'Brien-Kelly และผู้แต่งคนอื่นๆ. 2006. The role of natural resources in the Khmer Rouge-royal government of Cambodia peace negotiations and reinegration process. ม.ป.ท.:Chulalongkorn University;O'Brien-Kelly และผู้แต่งคนอื่นๆ. The role of natural resources in the Khmer Rouge-royal government of Cambodia peace negotiations and reinegration process. ม.ป.ท.:Chulalongkorn University, 2006. Print.