Kaysone Chansina และ Udomsak Seenprachawong. (2015) The economics of preserving a world heritage site : the case of Vat Phou and associated ancient setlements within the Champasak cultural landscape, Champasak province, Lao P.D.R. National Institute of Development Administration:ม.ป.ท.Kaysone Chansina และ Udomsak Seenprachawong. 2015. The economics of preserving a world heritage site : the case of Vat Phou and associated ancient setlements within the Champasak cultural landscape, Champasak province, Lao P.D.R. ม.ป.ท.:National Institute of Development Administration;Kaysone Chansina และ Udomsak Seenprachawong. The economics of preserving a world heritage site : the case of Vat Phou and associated ancient setlements within the Champasak cultural landscape, Champasak province, Lao P.D.R. ม.ป.ท.:National Institute of Development Administration, 2015. Print.