Παραπομπή APA

Knowles,L C A. (1921). The industrial and commercial revolutions in Great Britain during the nineteenth century (4.). Routledge and Kegan Paul.

Παραπομπή Chicago Style

Knowles,L C A. The Industrial and Commercial Revolutions in Great Britain During the Nineteenth Century. 4. London: Routledge and Kegan Paul, 1921.

Παραπομπή MLA

Knowles,L C A. The Industrial and Commercial Revolutions in Great Britain During the Nineteenth Century. 4. Routledge and Kegan Paul, 1921.