What is the sources for Bandung?
CREATE TABLE "largest_urban_areas_ranked_by_2010_proje" (
  "rank" real,
  "city" text,
  "country" text,
  "population" real,
  "area_km" real,
  "sources_of_pop_area" text
);
SELECT "sources_of_pop_area" FROM "largest_urban_areas_ranked_by_2010_proje" WHERE "city"='bandung';