Hochin, Choi
Sekyung Printing Co., Ltd., 1988
Buku Teks
Clapham, John, Sir, author
The Cambridge University Press, 1949
Buku Teks
Hong, Sung-gi, author
Il Chokak, 2001
Buku Teks
Gregg, Pauline, author
George G. Harrap, 1967
Buku Teks
Meier, Gerald M., author
Wiley, 1966
Buku Teks