Hyman, D. N. (1992). Study guide for use with Economics (2nd.ed.). IRWIN.
芝加哥风格引文Hyman, David N. Study Guide for Use with Economics. 2nd.ed. Illinois: IRWIN, 1992.
MLA引文Hyman, David N. Study Guide for Use with Economics. 2nd.ed. IRWIN, 1992.
警告：这些引文格式不一定是100％准确.