Case Karl E. (2018). Principles of Economics (12th.). Pearson.
芝加哥风格引文Case Karl E. Principles of Economics. 12th. Pearson, 2018.
MLA引文Case Karl E. Principles of Economics. 12th. Pearson, 2018.
警告：这些引文格式不一定是100％准确.
APA引文
Case Karl E. (2018). Principles of Economics (12th.). Pearson.
芝加哥风格引文Case Karl E. Principles of Economics. 12th. Pearson, 2018.
MLA引文Case Karl E. Principles of Economics. 12th. Pearson, 2018.