Frank, R. H. (2004). Principles of micro-economics. McGraw - Hill Irwin.
Trích dẫn kiểu ChicagoFrank, Robert H. Principles of Micro-economics. McGraw - Hill Irwin, 2004.
Deismireacht MLAFrank, Robert H. Principles of Micro-economics. McGraw - Hill Irwin, 2004.
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