| 1. | Slavin, S. L. (1996). Economics (4th ed.). USA: Times Mirror Higher Education. |
| 2. | Frank, R. H. (2008). Microeconomics and behaviour. New York: McGraw-Hill. |
| 3. | Lipsey, R.G., Courant, P. N., & Ragan, C. T. (1999). Microeconomics. (12th ed.). Addison-Wesley Publishing Company, USA. |
| 4. | Hasan, Z. (2006). Introduction to microeconomics: An Islamic perspective. Selangor: Prentice Hall, Pearson Malaysia Sdn. Bhd. |
| 5. | Parkin, M. & Bade, R. (2009). Foundations of microeconomics (4th ed.). Pearson Education, Inc. |
| 6. | Mankiw, N. G. (2004). Principles of economics (3rd ed.). Ohio: Thomson South-Western. |
| 7. | http://www.wiziq.com/tutorial/389-Demand-and-Supply-Analysis. |