(原始内容存档于2020-11-15). The Council of the European Communities. Council Directive80/181/EEC of 20 December 1979 on the approximation of the laws of the Member
(原始内容存档于2015-12-08). The Council of the European Communities. Council Directive80/181/EEC of 20 December 1979 on the approximation of the laws of the Member
" 存档副本. [2013-06-14]. (原始内容存档于2007-12-11). Council Directive on units of measurements 80/181/EEC (页面存档备份,存于互联网档案馆): "Special names for the unit of power: