Shepherd, W. G. (1997). The economics of industrial organization: Analysis, markets, policies (4th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Shepherd, William G. The Economics of Industrial Organization: Analysis, Markets, Policies. 4th ed. Upper Saddle River, N.J: Prentice Hall, 1997.
Lua MLA (9ú heag.)Shepherd, William G. The Economics of Industrial Organization: Analysis, Markets, Policies. 4th ed. Prentice Hall, 1997.
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