URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/sustainable-tourism-observatories--sto--framework-at-kspn--national-tourism-strategic-area-development--in-indonesia-dcfcd07e645d245babe887e5e2daa016/ac10b8cf-e9c2-11ef-ae8a-e4434b0aa6de