Zhang และผู้แต่งคนอื่นๆ. (2015) Valuing a high altitude mountain ecosystem and creating policy instruments for ecotourism development : a case study of Yulong mountain, China. National Institute of Development Administration:ม.ป.ท.Zhang และผู้แต่งคนอื่นๆ. 2015. Valuing a high altitude mountain ecosystem and creating policy instruments for ecotourism development : a case study of Yulong mountain, China. ม.ป.ท.:National Institute of Development Administration;Zhang และผู้แต่งคนอื่นๆ. Valuing a high altitude mountain ecosystem and creating policy instruments for ecotourism development : a case study of Yulong mountain, China. ม.ป.ท.:National Institute of Development Administration, 2015. Print.