References:
a.Marakas, George M., (2010). Systems Analysis and Design, 4th Edition, McGraw-Hill Companies
b. Kendall, K. and Kendall, J., (2010). Systems Analysis and Design, 8th Edition, Pearson
c. Witthen, J. L. and Bentley, L. D., (2010). Systems Analysis and Design, 7th Edition...