Gray, Richard, 1944-
American poetry of the twentieth century
Longman, 1991
Buku Teks
Berkowitz, Gerald M.
American drama of the twentieth century
Longman, 1994
Buku Teks
Braeman, John
American politics in the twentieth century
Thomas Y. Crowill, 1969
Buku Teks
Pearson, Frederic S.
International relations : the global condition in the late twentieth century
McGraw-Hill, 1992
Buku Teks
Bonner, Thomas Neville
Our recent past : American civilization in the twentieth century
Prentice-Hall, 1963
Buku Teks