แหล่งที่มา WikiPedia: ซิสตาร์19 http://www.allkpop.com/2011/05/sistar19-releases-d... http://www.allkpop.com/2013/01/sistar19-returns-wi... http://www.allkpop.com/2013/02/sistar19s-gone-not-... http://www.billboard.com/#/charts/k-pop-hot-100 http://www.starship-ent.com/sistar/ http://www.youtube.com/watch?v=JtVhwsACgTw http://www.youtube.com/watch?v=X6XXia5B2Wg&list=TL... http://www.gaonchart.co.kr/main/section/search/lis... http://starship-ent.co.kr/sistar/
