LEHMANN, M. B. (1996). Real World Economic Applications The Wall Street Journal Workbook. Irwin.
Lua i Stíl Chicago (17ú heag.)LEHMANN, Michael B. Real World Economic Applications The Wall Street Journal Workbook. Irwin, 1996.
Lua MLA (8ú heag.)LEHMANN, Michael B. Real World Economic Applications The Wall Street Journal Workbook. Irwin, 1996.
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