Seigel, J. E. (1993). Marx's fate: The shape of a life. The Pennsylvania State University Press.
Lua i Stíl Chicago (17ú heag.)Seigel, Jerrold E. Marx's Fate: The Shape of a Life. University Park, Pennsylvania: The Pennsylvania State University Press, 1993.
Lua MLA (9ú heag.)Seigel, Jerrold E. Marx's Fate: The Shape of a Life. The Pennsylvania State University Press, 1993.
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