Knowler, L. (1926). Industrial & commercial revolutions in Great Britain etc (4th.). Routledge & Kegan Paul.
Lua i Stíl Chicago (17ú heag.)Knowler, L. Industrial & Commercial Revolutions in Great Britain Etc. 4th. London: Routledge & Kegan Paul, 1926.
Lua MLA (9ú heag.)Knowler, L. Industrial & Commercial Revolutions in Great Britain Etc. 4th. Routledge & Kegan Paul, 1926.
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