SAMUELSON, P. A., & NORDHAUS, W. D. (1989). Macroeconomics: A version of economics.-- Ed.13. McGraw-Hill.
芝加哥风格引文SAMUELSON, Paul A., 与 William D. NORDHAUS. Macroeconomics: A Version of Economics.-- Ed.13. New York: McGraw-Hill, 1989.
MLA引文SAMUELSON, Paul A., 与 William D. NORDHAUS. Macroeconomics: A Version of Economics.-- Ed.13. McGraw-Hill, 1989.
警告：这些引文格式不一定是100％准确.