Wilson, Arnold T.
Persian gulf : an historical sketch from the earliest times to the beginning of twentieth century
George Allen and Unwin, 1959
 Buku Teks SO
Keylor, William R., 1944-
The twentieth-century world
Oxford University Press, 1996
 Buku Teks
Black, C.E.
Twentieth Century Europe: a history
Alfred A. Knopf, 1966
 Buku Teks
Gossel, Peter
Architecture in the twentieth century
Taschen, 2001
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Woodham, Jonatham M.
Twentieth-Century design
Oxford University Press, 1997
 Buku Teks