Παραπομπή APA

Walker,Hugh D. (1971). Market power and price levels in the ethical drug industry. Indiana University Press.

Παραπομπή Chicago Style

Walker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. London: Indiana University Press, 1971.

Παραπομπή MLA

Walker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. Indiana University Press, 1971.