Bowden, W. (1967). The industrial history of the United States. A. M. Kelley.
Lua i Stíl Chicago (17ú heag.)Bowden, Witt. The Industrial History of the United States. New York: A. M. Kelley, 1967.
Lua MLA (8ú heag.)Bowden, Witt. The Industrial History of the United States. A. M. Kelley, 1967.
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