Frank, R. H., Bernanke, B., Mogab, J., & McClung, B. (2004). Study guide for use with principles of macroeconomics (2nd ed.). McGraw-Hill/Irwin.

Frank, Robert H., Ben Bernanke, Jack Mogab, and Bruce McClung. Study Guide for Use with Principles of Macroeconomics. 2nd ed. Boston: McGraw-Hill/Irwin, 2004.

Frank, Robert H., et al. Study Guide for Use with Principles of Macroeconomics. 2nd ed. McGraw-Hill/Irwin, 2004.