Liên quan 4 4X 4Minute 4 (album của Beyoncé) 4 (số) 4G 4chan 4 Minutes 4 năm, 2 chàng, 1 tình yêu 47 Rōnin
Tài liệu tham khảo WikiPedia: 4 Walls http://www.billboard.com/articles/columns/k-town/6... http://www.hanteo.com/search/nalbum_info2.asp?mcod... http://www.melon.com/album/detail.htm?albumId=2646... http://www.oricon.co.jp/rank/ja/w/2015-11-16/p/4/ http://gaonchart.co.kr/main/section/chart/album.ga... http://gaonchart.co.kr/main/section/chart/album.ga... http://gaonchart.co.kr/main/section/chart/album.ga... https://itunes.apple.com/album/id1052057270 https://www.youtube.com/watch?v=4j7Umwfx60Q https://web.archive.org/web/20151111074135/http://...
