Lubis, M. “The Role Of NGO In Ecotourism Development In The Bukit Lawang Tourism Village Plantation, North Sumatra”. Journey : Journal of Tourismpreneurship, Culinary, Hospitality, Convention and Event Management, Vol. 6, no. 1, June 2023, pp. 43-52, doi:10.46837/journey.v6i1.155.