edited by H.V. Hodson
Longman, 1986
Buku Referensi
edited by H.V. Hodson
Longman, 1983
Buku Referensi
YEAR Incorporated, [date of publication not identified]
Buku Teks
Yonhap News Agency, 1991
Buku Referensi
edited by Frank E. Bair
Gale Research Inc., 1991
Buku Referensi