FERGUSON, C. (1965). Principles Of Economics C.e. Ferguson And Juanita M. Kreps. Holt, Rinehart and Wiston.
Lua i Stíl Chicago (17ú heag.)FERGUSON, C.E. Principles Of Economics C.e. Ferguson And Juanita M. Kreps. Holt, Rinehart and Wiston, 1965.
Lua MLA (8ú heag.)FERGUSON, C.E. Principles Of Economics C.e. Ferguson And Juanita M. Kreps. Holt, Rinehart and Wiston, 1965.
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