Praedau Foopanichpruk และ Pairote Pathranarakul. (2015) Policy framework and strategic measures for enhancing sustainable tourism development : a case of active beach tourism cluster. National Institute of Development Administration:ม.ป.ท.Praedau Foopanichpruk และ Pairote Pathranarakul. 2015. Policy framework and strategic measures for enhancing sustainable tourism development : a case of active beach tourism cluster. ม.ป.ท.:National Institute of Development Administration;Praedau Foopanichpruk และ Pairote Pathranarakul. Policy framework and strategic measures for enhancing sustainable tourism development : a case of active beach tourism cluster. ม.ป.ท.:National Institute of Development Administration, 2015. Print.