Frank, Robert,  2011- <br/><br/>Principles of economics : Robert H. Frank.  - New York :  McGraw-Hill Companies Inc.,  ©2011.  - xxxi, 633 pages ;  illustration ;  28 cm <br/><br/><label>ISBN: </label>9780071220774 <br/><br/><label>LC Class. No.: </label>HB 171.5  / F828 2011