Cita APA (7a ed.)
Marx, K., & Engels, F. (1973). Karl Marx and Frederick Engels: Selected Correspondence.
Cita estilo Chicago (17a ed.)
Marx, Karl, y Friedrich Engels. Karl Marx and Frederick Engels: Selected Correspondence. 1973.
Cita MLA (9a ed.)
Marx, Karl, y Friedrich Engels. Karl Marx and Frederick Engels: Selected Correspondence. 1973.
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