Reese, Trevor R.
Australia in the twentieth century : a political history / Trevor R. Reese
F.W. Cheshire, 1964
 Buku Teks SO
Black, C.E.
Twentieth Century Europa: a history
Alfred A. Knopf, 1961
 Buku Teks SO
Black, C.E.
Twentieth Century Europe: a history
Alfred A. Knopf, 1966
 Buku Teks SO
Twentieth century Australian literary criticism
edited by Clement Semmler
Oxford University Press, 1967
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Keylor, William R., 1944-
The twentieth-century world : an international history
Oxford University Press, 1996
 Buku Teks SO