Frey, B. S. (1983). Democratic economic policy: A theoretical introduction. St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Frey, Bruno S. Democratic Economic Policy: A Theoretical Introduction. New York: St. Martin's Press, 1983.
Lua MLA (9ú heag.)Frey, Bruno S. Democratic Economic Policy: A Theoretical Introduction. St. Martin's Press, 1983.
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