Source: Badan Pusat Statistik 2010. These figures include the population of the city and four northerly regencies split off in 2012 to form the new North Kalimantan Province.
^Verdier, A.C., Oki, T., and Suardy, A., 1980, Geology of the Handil Field (East Kalimantan-Indonesia), in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Halbouty, M.T., editor, Tulsa: American Association of Petroleum Geologists, ISBN0-89181-306-3, p. 401
^Huffington, R.M., and Helmig, H.M., Discovery and Development of the Badak Field, East Kalimantan, Indonesia,1980, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Halbouty, M.T., editor, Tulsa: American Association of Petroleum Geologists, ISBN0-89181-306-3, p. 441
^DeMatharel, M., Lehmann, P., Oki, T., Geology of the Bekapai Field, in Giant Oil and Gas Fields of the Decade:1968-1978, AAPG Memoir 30, Halbouty, M.T., editor, Tulsa: American Association of Petroleum Geologists, ISBN0-89181-306-3, p. 459