057 Sumber Referensi
- http://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_area
- http://en.wikipedia.org/wiki/Indonesia
- http://www.bps.go.id/brs_file/pariwisata_01juli14.pdf
- http://www.bfs.admin.ch/bfs/portal/en/index/regionen/thematische_karten/maps/tourismus.parsys.0001.PhotogalleryDownloadFile1.tmp/k10.01s.pdf
- http://ec.europa.eu/enterprise/sectors/tourism/files/studies/competitiveness/study_on_tourism_competitiveness_2009_en.pdf
- http://en.wikipedia.org/wiki/List_of_countries_by_Human_Development_Index#Low_human_development
- http://www.transparency.org/cpi2013/results
Hanya sedikit referensi dari begitu banyak sumber yang ada di Internet.
