Samuelson, P. A. (1964). Economics: An introductory analysis. New York: McGraw-hill.
Trích dẫn kiểu ChicagoSamuelson, Paul Anthony. Economics: An Introductory Analysis. New York: McGraw-hill, 1964.
Deismireacht MLASamuelson, Paul Anthony. Economics: An Introductory Analysis. New York: McGraw-hill, 1964.
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