Hart, P., & Clarke, R. (1980). Concentration in British industry 1935-75: A study of the growth, causes and effects of concentration in British manufacturing industries. Cambridge University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHart, P.E, और R.;Hart Clarke. Concentration in British Industry 1935-75: A Study of the Growth, Causes and Effects of Concentration in British Manufacturing Industries. Cambridge University Press, 1980.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHart, P.E, और R.;Hart Clarke. Concentration in British Industry 1935-75: A Study of the Growth, Causes and Effects of Concentration in British Manufacturing Industries. Cambridge University Press, 1980.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.