Tài liệu tham khảo

WikiPedia: Ri Yong-jik http://english.cntv.cn/2015/01/15/VIDE142130820177... http://www.national-football-teams.com/player/5804... http://www.v-varen.com/club/20217.html http://www.jleague.jp/club/nagasaki/player/detail/... http://www.kamatamare.jp/player/df/17.html https://uk.eurosport.yahoo.com/news/football-china... https://www.amazon.co.jp/2016J1-J2-J3%E9%81%B8%E6%... https://www.amazon.co.jp/2017-J1-J3%E9%81%B8%E6%89... https://data.j-league.or.jp/SFIX04/?player_id=1131... https://web.archive.org/web/20150128114009/https:/...