대한민국의 국민투표
http://www.segye.com/Articles/News/Society/Article.asp?aid=20070201000410&ctg1=04&ctg2=00&subctg1=04&subctg2=00&cid=0101080400000&dataid=200702011711002362
http://www.segye.com/Articles/News/Society/Article.asp?aid=20070201000410&ctg1=04&ctg2=00&subctg1=04&subctg2=00&cid=0101080400000&dataid=200702011711002362한글 맞춤법 - 위키백과, 우리 모두의 백과사전
https://ko.wikipedia.org/wiki/%ED%95%9C%EA%B8%80_%EB%A7%9E%EC%B6%A4%EB%B2%95