PETERSON, W. L. (1986). Principles Of Economics Micro Willis L. Peterson. Irwin.
Lua i Stíl Chicago (17ú heag.)PETERSON, Willis L. Principles Of Economics Micro Willis L. Peterson. Irwin, 1986.
Lua MLA (8ú heag.)PETERSON, Willis L. Principles Of Economics Micro Willis L. Peterson. Irwin, 1986.
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