Lee, Yon-suk, author
Yeusook Lee, 2004
Buku Referensi
Lee, Yons-suk, author
Yonsei University Press, 2004
Buku Teks
Yu, Dok-son, author
Hong Mun Gwan, 2009
Buku Referensi
Bae, Yong-pha, author
Onbooks, 2006
Buku Teks
Kim, Yol-gyu, author
Woong Jin Jisik House, 2009
Buku Teks