Sarun Kamolthip และ Udomsak Seenprachawong. (2016) Enhancing the effectiveness of the policy design of Thailand's national parks using random utility model: case study of Khao Yai National Park. National Institute of Development Administration:ม.ป.ท.Sarun Kamolthip และ Udomsak Seenprachawong. 2016. Enhancing the effectiveness of the policy design of Thailand's national parks using random utility model: case study of Khao Yai National Park. ม.ป.ท.:National Institute of Development Administration;Sarun Kamolthip และ Udomsak Seenprachawong. Enhancing the effectiveness of the policy design of Thailand's national parks using random utility model: case study of Khao Yai National Park. ม.ป.ท.:National Institute of Development Administration, 2016. Print.