Kim, Kyu-jung
Changbi Publishers, 2010
Buku Teks
Park, Jong-ho
Changbi , 2011
Buku Teks
Seong Ha Seong
Buku Teks
by Lee Sam Hyong ... [and others]
Joongang kyoyook jin heung yeongooso, 2003
Buku Teks
Lee, Ki-mun
Seoul Doosan Dong a, 2003
Buku Referensi