Black, C.E.
Twentieth Century Europa: a history
Alfred A. Knopf, 1961
 Buku Teks
Black, C.E.
Twentieth Century Europe: a history
Alfred A. Knopf, 1966
 Buku Teks
Keylor, William R., 1944-
The twentieth-century world : an international history
Oxford University Press, 1996
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Nichols, Jeannette P.
Twentieth century United States : a history
D. Appleton-Century, 1943
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Readings in twentieth-century European history
edited by Alexander Baltzly, A. William Salomone
Appleton-Century-Crofts, 1950
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