Kaelble, H. (1986). Industrialisation and social inequality in 19th century Europe. St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Kaelble, Hartmut. Industrialisation and Social Inequality in 19th Century Europe. New York: St. Martin's Press, 1986.
Lua MLA (9ú heag.)Kaelble, Hartmut. Industrialisation and Social Inequality in 19th Century Europe. St. Martin's Press, 1986.
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