Walker,Hugh D. (1971). Market power and price levels in the ethical drug industry. Indiana University Press.
استشهاد بنمط شيكاغوWalker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. London: Indiana University Press, 1971.
MLA استشهادWalker,Hugh D. Market Power and Price Levels in the Ethical Drug Industry. Indiana University Press, 1971.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.