Hardwick, P., & Langmead, J. a. K. B. (1999). An introduction to modern economics (5th ed.). Prentice hall.
芝加哥风格引文Hardwick, Philip, 与 John and Khan Bhadur Langmead. An Introduction to Modern Economics. 5th ed. Harlow, England: Prentice hall, 1999.
MLA引文Hardwick, Philip, 与 John and Khan Bhadur Langmead. An Introduction to Modern Economics. 5th ed. Prentice hall, 1999.
警告：这些引文格式不一定是100％准确.