Aron, Raymond
The century of total war / Raymond Aron
Doubleday and Company, Inc., 1954
Buku Teks
Keylor, William R., 1944-
The twentieth-century world : an international history
Oxford University Press, 1996
Buku Teks
Great events : the twentieth century 1900-1916
Salem Press , 1992
Buku Referensi
Great events : the twentieth century 1916-1930
Salem Press , 1992
Buku Referensi
Great events : the twentieth century 1931-1939
Salem Press , 1992
Buku Referensi