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WikiPedia: สถานะนครในประเทศอินโดนีเซีย http://jakarta-tourism.go.id/visit/blog/2017/06/ko... http://www.Kemendagri.go.id/pages/profil-daerah/ka... http://www.Kemendagri.go.id/pages/profil-daerah/pr... http://data.UN.org/Data.aspx?q=sample+survey&d=POP... https://jatim.antaranews.com/berita/153770/sejarah... https://books.google.com/books?id=IoUeAAAAMAAJ&q=g... https://books.google.com/books?id=R7-xvYmg3HcC&q=g... https://books.google.com/books?id=U6xwAAAAMAAJ&q=R... https://books.google.com/books?id=VsdwAAAAMAAJ&q=g... https://books.google.com/books?id=aRFJjjonas4C&q=g...