Ilyon, author
l Yonsei University Press, 1972
Buku Teks
Artikel Jurnal
Davidson, Basil, author
Time-Life International, 1967
Buku Teks
by Aleksey Maksimovich Gor`kiy; translated by Margaret Wettlin
Foreign Languages Publishing House, [date of publication not identified]
Buku Teks
Tapsell, R.F., author
Thames and Hudson, 1987
Buku Referensi