opportunity,not fate
Artikel Jurnal
Cho, Hae-il
America
Dong-su-Munhak-sa, 1990
Buku Teks
America
New York: W.W.Norton & Company, 1988,
Buku Referensi
Only permanent interests
Artikel Jurnal
For inspiration only : future systems
Academy Editions, 1996
Buku Teks SO