Cita APA

 McConnell, C. R. (2012).  Economics: Principles, problems, and policies.  McGraw-Hill /Irwin.

Chicago Style Citation

 McConnell, Campbell R.  Economics: Principles, Problems, and Policies.  McGraw-Hill /Irwin, 2012.

Cita MLA

 McConnell, Campbell R.  Economics: Principles, Problems, and Policies.  McGraw-Hill /Irwin, 2012.

Atenció: Aquestes cites poden no estar 100% correctes.