DAMANIK, S. E.; ROZALINA, R.; NURRACHMANIA, M. Influence of sipinsur ecotourism area business opportunity on regional development in humbang hasundutan regency. International journal of business, economics & management, [S. l.], v. 4, n. 1, p. 130-134, 2021. DOI: 10.31295/ijbem.v4n1.1336. Disponível em: https://sloap.org/journal/index.php/ijbem/article/view/1336. Acesso em: 16 jul. 2024.