1.
Damanik SE, Rozalina R, Nurrachmania M. Influence of sipinsur ecotourism area business opportunity on regional development in humbang hasundutan regency. Int. j. bus. econ. manag. (Lond.) [Internet]. 2021Apr.7 [cited 2026Apr.28];4(1):130-4. Available from: https://sloap.org/journal/index.php/ijbem/article/view/1336