Berkowitz, Gerald M.
American drama of the twentieth century
Longman, 1994
 Buku Teks
Readings in twentieth-century European history
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
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Woodham, Jonatham M.
Twentieth-Century design
Oxford University Press, 1997
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Revolutions of the late twentieth century
edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
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Black, C.E.
Twentieth Century Europa: a history
Alfred A. Knopf, 1961
 Buku Teks