Korean Overseas Information Service, 1978
Buku Teks
Hendel, Charles W., author
The Bobbs-Merrill, 1963
Buku Teks
Dow, Hume
Oxford University Press, 1971
Buku Teks
Mossner, Ernest Campbell, author
Columbia University Press, 1943
Buku Teks
edited by David Boucher and Paul Kelly
Routledge, 1998
Buku Teks