Nguyen Huu Giap และผู้แต่งคนอื่นๆ. (2019) Enhancing the Recreational Benefits of Trang An Landscape Complex for Vietnamese Visitors. <i>Southeast Asian Journal of Economics</i>, <i>7</i>(1), 41-70.Nguyen Huu Giap และผู้แต่งคนอื่นๆ. "Enhancing the Recreational Benefits of Trang An Landscape Complex for Vietnamese Visitors". Southeast Asian Journal of Economics 7 (2019):41-70.Nguyen Huu Giap และผู้แต่งคนอื่นๆ. Enhancing the Recreational Benefits of Trang An Landscape Complex for Vietnamese Visitors. Faculty of Economics, Chulalongkorn University:ม.ป.ท. 2019.