APA citiranje

Gregory, P. R. (2005). Essentials of economics. Boston, MA: Pearson Education.

Trích dẫn kiểu Chicago

Gregory, Paul R. Essentials of Economics. Boston, MA: Pearson Education, 2005.

MLA citiranje

Gregory, Paul R. Essentials of Economics. Boston, MA: Pearson Education, 2005.

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