Schultz, T. W. (1980). Investing in people: The economics of population quality. London: University Of California Press.
Trích dẫn kiểu ChicagoSchultz, Theodore W. Investing in People: The Economics of Population Quality. London: University Of California Press, 1980.
Deismireacht MLASchultz, Theodore W. Investing in People: The Economics of Population Quality. London: University Of California Press, 1980.
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