Schumpeter, Joseph A.
Capitalism, socialism, and democracy
Harper , 1950
 Buku Teks SO
Ebenstein, William
Today's isms: communism, fascism, capitalism, socialism
Prentice-Hall, 1954
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Sherman, Howard J.
Radical political economy : capitalism and socialism from a Marxist-humanist perspective
Basic Books, 1972
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Sweezy, Paul M. (Paul Marlor), 1910-2004
Socialism
McGraw-Hill, 1949
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Sweezy, Paul M. (Paul Marlor), 1910-2004
Socialism
McGraw-Hill, 1949
 Buku Teks SO