So, Sang-gyu, author
Sinwon Puraim, 2006
Buku Referensi
Lee, Eng-baek, author
Kooke Yeon Goo So, Ko1988
Buku Teks
O, Sung-un
Han'gul P'ak'u, 2010
Buku Teks
Komyunikeisyon Buksu, 2006
Buku Teks
Doff, Adrian, author
Cambridge University Press, 2010
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