Roll of Ipsden, E. R. (1992). A history of economic thought (5th rev. ed.). Rupa & Co..
Lua i Stíl Chicago (17ú heag.)Roll of Ipsden, Eric Roll. A History of Economic Thought. 5th rev. ed. New Delhi: Rupa & Co., 1992.
Lua MLA (8ú heag.)Roll of Ipsden, Eric Roll. A History of Economic Thought. 5th rev. ed. Rupa & Co., 1992.
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