America
New York: W.W.Norton & Company, 1988,
 Buku Referensi
Cho, Hae-il
America
Dong-su-Munhak-sa, 1990
 Buku Teks SO
Spain and the rule of law /
International Commission of Jurists, 1962
 Buku Teks
Spain and the rule of law
Geneva International Commission of Jurists 1962
 Buku Teks
Art and architecture of Spain
edited by Xavier Barral I. Atlet
Little, Brown, 1998
 Buku Teks SO