Wilde, Lawrence
Modern European socialism
Dartmouth, 1994
 Buku Teks SO
Sweezy, Paul M. (Paul Marlor), 1910-2004
Socialism
McGraw-Hill, 1949
 Buku Teks SO
Sweezy, Paul M. (Paul Marlor), 1910-2004
Socialism
McGraw-Hill, 1949
 Buku Teks SO
Collins, James
A history of modern European philosophy
Bruce Publishing, 1954
 Buku Teks SO
Agrarian condition in modern European history
edited by Charles K. Warner
Macmillan, 1966
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