POLICHARPUS RAJA PETA. Strategi Pengembangan Ecotourism Pulau Derawan Kabupaten Berau Kaltim. EDUTOURISM Journal Of Tourism Research, [S. l.], v. 1, n. 01, p. 35–45, 2019. DOI: 10.53050/ejtr.v1i01.153. Disponível em: https://ejurnal.polnes.ac.id/index.php/edutourism/article/view/153. Acesso em: 30 oct. 2026.