Tài liệu tham khảo WikiPedia: VDC-Net2E http://gamethu.vnexpress.net/gt/diem-tin/2012/05/2... http://ongame.vn/ http://tuoitre.vn/Kinh-te/109977/VDC-NET2E-ban-30-... http://vtc.vn/397-218069/thegioigame/vdc-net2e-chi...