Schneierson, V. (1987). Frederick Engels: His life and work. Moscow: Progress Publishers.
Citace podle Chicago (17th ed.)Schneierson, Vic. Frederick Engels: His Life and Work. Moscow: Progress Publishers, 1987.
Citace podle MLA (8th ed.)Schneierson, Vic. Frederick Engels: His Life and Work. Moscow: Progress Publishers, 1987.
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