Friedman, M. (1979). Free to choose: A personal statement. London: Secker & Warburg.
Trích dẫn kiểu ChicagoFriedman, Milton. Free to Choose: A Personal Statement. London: Secker & Warburg, 1979.
Deismireacht MLAFriedman, Milton. Free to Choose: A Personal Statement. London: Secker & Warburg, 1979.
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