[1] Territory Containment (UN M.49) ( ( 版)) http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/territory_containment_un_m_49.html
[2] United Nations Statistics Division- Standard Country and Area Codes Classifications (M49) ( ( 版)) http://unstats.un.org/unsd/methods/m49/m49regin.htm
[3] UN M.49 - Wikipedia, the free encyclopedia ( ( 版)) http://en.wikipedia.org/wiki/UN_M.49
[4] Territory Containment (UN M.49) ( ( 版)) http://www.unicode.org/cldr/charts/latest/supplemental/territory_containment_un_m_49.html