Hochin, Choi
Sekyung Printing Co., Ltd., 1988
Buku Teks
Clapham, John, Sir, author
The Cambridge University Press, 1949
Buku Teks
Easton, Stewart C., author
Holt, Rinehart and Winston, 1955
Buku Teks
Wilson, Arnold T., author
George Allen and Unwin, 1959
Buku Teks
Ghirshman, R.
Penguin Books, 1954
Buku Teks