Ferguson, C. E., & Kreps, J. M. (1965). Principles of economics. New York: Holt, Rinehart and Winston.
Trích dẫn kiểu ChicagoFerguson, C. E., và Juanita M. Kreps. Principles of Economics. New York: Holt, Rinehart and Winston, 1965.
Deismireacht MLAFerguson, C. E., và Juanita M. Kreps. Principles of Economics. New York: Holt, Rinehart and Winston, 1965.
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