Francis, M. (2007). Herbert Spencer and the invention of modern life. Acumen.
Chicago-čujuhus (17. p.)Francis, Mark. Herbert Spencer and the Invention of Modern Life. Stocksfield [U.K.]: Acumen, 2007.
MLA-čujuhus (9. p.)Francis, Mark. Herbert Spencer and the Invention of Modern Life. Acumen, 2007.
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