BETTS, B. S. H. The Role of Tourism in the Development of Sierra Leone. American Scientific Research Journal for Engineering, Technology, and Sciences, [S. l.], v. 26, n. 4, p. 205–224, 2016. Disponível em: https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/2405. Acesso em: 1 may. 2024.