Yusnikusumah, T. R. and Sulistyawati, E. (2016) “Evaluation of Ecotourism Management in Tangkahan Ecotourism Region, National Park of Mount Leuser in North Sumatera”, Journal of Regional and City Planning, 27(3), pp. 173-189. doi: 10.5614/jrcp.2016.27.3.1.