Lee, Jae Gi
Hyeondae hanguk mooyeokron
Chongmok, 2007
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I, Jeong U
Segyehwasidae Hanguk gyeong je ui Jiiio
Doseochulphan Hanul, 2008
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Jeong, Gu Hyeon.
Hangukgicopui geulrobeol gyeongyeong
Wisdom House, 2008
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Ryu, Dae Hyun
Kyung je sang sik
Sae ro wun je an, 2008
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Gyongje: gamsu gong byongho=Korean economy
I & Book, 2009
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