Blum, M. E. (1985). The Austro-Marxists, 1890-1918: A psychobiographical study. The University Press of Kentucky.
Lua i Stíl Chicago (17ú heag.)Blum, Mark E. The Austro-Marxists, 1890-1918: A Psychobiographical Study. Lexington, Kentucky: The University Press of Kentucky, 1985.
Lua MLA (9ú heag.)Blum, Mark E. The Austro-Marxists, 1890-1918: A Psychobiographical Study. The University Press of Kentucky, 1985.
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