Koehler, Robert, 1975-
Seoul Selection, 2009
Buku Referensi
Myung Bak Lee, 2006
Buku Referensi
Koehler, Robert, author
Seoul Selection, 2009
Buku Teks
Crowe, Mary, author
MacIntyre Purcell Pub, 2010
Buku Teks
Choi, Joon-sik, author
Her One Media, 2009
Buku Teks