Riazanov, D. (1973). Karl Marx and Friedrich Engels: An introduction to their lives and work. Monthly Review Press.
Citace podle Chicago (17th ed.)Riazanov, David. Karl Marx and Friedrich Engels: An Introduction to Their Lives and Work. Nueva York: Monthly Review Press, 1973.
Citace podle MLA (9th ed.)Riazanov, David. Karl Marx and Friedrich Engels: An Introduction to Their Lives and Work. Monthly Review Press, 1973.
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