Rose, Arnold M.
The roots of prejudice
UNESCO, 1951
Buku Teks
Berlin, Isaiah
The Roots of romanticism
Princeton University Press, 2001
Buku Teks SO
Cho, Hae-il
America
Dong-su-Munhak-sa, 1990
Buku Teks
America
New York: W.W.Norton & Company, 1988,
Buku Referensi
White, Theodore H.
China the roots of madness a documentary
Bantam Books, 1968
Buku Teks