Boyes,William, & Melvin, M. (2003). Principles of economics (NA.). Cengage Learning.
芝加哥风格引文Boyes,William, 与 Michael Melvin. Principles of Economics. NA. Australia: Cengage Learning, 2003.
MLA引文Boyes,William, 与 Michael Melvin. Principles of Economics. NA. Cengage Learning, 2003.
警告：这些引文格式不一定是100％准确.