CASE, K. E. (2017). Principles of economics. Pearson Education.
芝加哥风格引文CASE, Karl E. Principles of Economics. Pearson Education, 2017.
MLA引文CASE, Karl E. Principles of Economics. Pearson Education, 2017.
警告：这些引文格式不一定是100％准确.
APA引文