Melvin, M. &. B. (2013). Principles of Economics (9th.). Cengage Learning.
芝加哥风格引文Melvin, Michael & Boyes. Principles of Economics. 9th. Canada: Cengage Learning, 2013.
MLA引文Melvin, Michael & Boyes. Principles of Economics. 9th. Cengage Learning, 2013.
警告：这些引文格式不一定是100％准确.