Twentieth-century European drama
edited by Brian Docherty
Macmillan, 1994
 Buku Teks SO
Gray, Richard, 1944-
American poetry of the twentieth century
Longman, 1991
 Buku Teks SO
Braeman, John
American politics in the twentieth century
Thomas Y. Crowill, 1969
 Buku Teks SO
Bonner, Thomas Neville
Our recent past : American civilization in the twentieth century
Prentice-Hall, 1963
 Buku Teks SO
Hacker, Louis M.
The triumph of American capitalism : the development of forces in American history to the beginning of the twentieth century
McGraw-Hill, 1965
 Buku Teks SO