Steenson, G. P. (1978). Karl Kautsky, 1854-1938: Marxism in the classical years. University of Pittsburgh Press.
Citace podle Chicago (17th ed.)Steenson, Gary P. Karl Kautsky, 1854-1938: Marxism in the Classical Years. Pittsburgh: University of Pittsburgh Press, 1978.
Citace podle MLA (8th ed.)Steenson, Gary P. Karl Kautsky, 1854-1938: Marxism in the Classical Years. University of Pittsburgh Press, 1978.
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