Langford, H. D. The Imagery of Alienation: Howard D. Langford. Marxism and alienation.(1965).
Lua i Stíl Chicago (17ú heag.)Langford, Howard D. "The Imagery of Alienation: Howard D. Langford." Marxism and Alienation.(1965) .
Lua MLA (8ú heag.)Langford, Howard D. "The Imagery of Alienation: Howard D. Langford." Marxism and Alienation.(1965), .
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