Twentieth century Australian literary criticism
edited by Clement Semmler
Oxford University Press, 1967
 Buku Teks
Elkins, William R.
Literary reflections
McGraw-Hill, 1982
 Buku Teks
Revolutions of the late twentieth century
edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
 Buku Teks
Black, C.E.
Twentieth Century Europa: a history
Alfred A. Knopf, 1961
 Buku Teks
Varga, Eugen, 1879-1964
Twentieth century capitalism
Foreign Languages Publishing House, 1961
 Buku Teks