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Hearts of Iron II Hearts of Iron III Heartstrings Hearts Still Beating Hearts of Iron IV Hearts of Iron Hearts and Arrows Hearts Don't Break Around Here Heart Shaker HearthstoneTài liệu tham khảo
WikiPedia: Hearts of Iron http://www.chinadaily.com.cn/english/doc/2004-05/2... http://www.gamefaqs.com/mac/921821-hearts-of-iron/... http://www.gamefaqs.com/pc/560933-hearts-of-iron/d... http://www.gamershell.com/articles/810.html http://www.gamespot.com/hearts-of-iron/reviews/hea... http://www.paradoxplaza.com/games/hearts-of-iron http://www.paradoxplaza.com/games/hearts-of-iron-t... https://web.archive.org/web/20090715092441/http://... https://web.archive.org/web/20110611194351/http://... https://web.archive.org/web/20111115110045/http://...