Heilbroner, R. L. (1980). Marxism: For and against. W. W. Norton.
Cita Chicago (17th ed.)Heilbroner, Robert L. Marxism: For and Against. New York: W. W. Norton, 1980.
Cita MLA (9th ed.)Heilbroner, Robert L. Marxism: For and Against. W. W. Norton, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.