Lichtheim, George
Imperialism / George Lichtheim
Praeger, 1971
 Buku Teks
Rubakin, A.N.
Imperializm i uhudsheniye zdoroviya trudiyashihsya
Moskwa Sotsialno Ekonomi ceskoi Literature 1959
 Buku Teks
Europeaan inheritasce
London: Oxford at the Clrendon Press, 1954
 Buku Teks
European studies review
London : Sage Publication
 Majalah, Jurnal, Buletin
Welch, David
Modern European history 1871-1975: a documentary reader
Heinemann, 1994
 Buku Teks