URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/springs-and-tourism-facilities-development-in-purwosari--gunungkidul--special-region-of-yogyakarta--indonesia-dcfcd07e645d245babe887e5e2daa016/4160c511-873b-11ee-abf0-e4434b0aade8