Cita APA

Paul R. Gregory. (2005). Essential of economics. Boston: Pearson addition Wesley.

Chicago Style Citation

Paul R. Gregory. Essential of Economics. Boston: Pearson addition Wesley, 2005.

Cita MLA

Paul R. Gregory. Essential of Economics. Boston: Pearson addition Wesley, 2005.

Atenció: Aquestes cites poden no estar 100% correctes.