Samuelson, P. A., & Nordhaus, W. D. (2022). Economics (20th.). McGraw Hill Education.
芝加哥风格引文Samuelson, Paul A., 与 William D. Nordhaus. Economics. 20th. New Delhi: McGraw Hill Education, 2022.
MLA引文Samuelson, Paul A., 与 William D. Nordhaus. Economics. 20th. McGraw Hill Education, 2022.
警告：这些引文格式不一定是100％准确.