Richards, A. (1986). Development and modes of production in Marxian economics: A critical evaluation. Harwood Academic.
Lua i Stíl Chicago (17ú heag.)Richards, Alan. Development and Modes of Production in Marxian Economics: A Critical Evaluation. Chur: Harwood Academic, 1986.
Lua MLA (9ú heag.)Richards, Alan. Development and Modes of Production in Marxian Economics: A Critical Evaluation. Harwood Academic, 1986.
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