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Lee, Su Jim
Sseugi su-eop hyeonsong-e Ihae / Lee Su Jim.
Bagajeong, 2007
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Yi, Ki-hyong,1917-
Yo Un-hyong pyongjon
Silchon Munhaksa , 2004
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Lee, Yang Hye
Shibgaebaeunen hangugo jakmun
Language Plus, 2009
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Hangugo nengryeok siherom sseugi
edited by Koh Ryuk Yong
Pagijong, 2008
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