Cita APA

 Frank, R. H. (2011).  Principles of microeconomics.  McGraw-Hill/Irwin.

Chicago Style Citation

 Frank, Robert H.  Principles of Microeconomics.  McGraw-Hill/Irwin, 2011.

Cita MLA

 Frank, Robert H.  Principles of Microeconomics.  McGraw-Hill/Irwin, 2011.

Atenció: Aquestes cites poden no estar 100% correctes.