Methopld, Ken
Compass Publishing, 2007
Buku Teks
Methopld, Ken
Compass Publishing, [date of publication not identified]
Buku Teks
Sing, Dong Heun
Hwang Gem Gaji, 2003
Buku Teks
Yeowanmidio, 2007
Buku Teks
Zŏng, In-sŏb
Chung-ang University, 1968
Buku Teks