Wittkopf, Eugene R.
Thomson wadsworth, 2008
Buku Teks
McCamy, James L.
Alfred A. Knopf, 1952
Buku Teks
Kennan, George F., 1904-
Princeton University Press , 1954
Buku Teks
Herrick, Christopher
Longman, 2003
Buku Teks
Brown, William Adams
Brookongs Institutons, 1954
Buku Teks