Mankiw, N. Gregory. Principles of economics / Economics. N. Gregory Mankiw. - 6th ed. - Mason, OH : South-Western Cengage Learning, 2012. - xxxii, 856 p. : col. ill. ; 26 cm. Includes index. ISBN: 9780538453059 (hbk.) RM775.39 0538453052 (hbk.) Subjects--Topical Terms: Economics.