Hoffer, J. A., George, J. F., & Valacich, J. S. (2000). Modern systems analysis and design (Second edition.). Addison-Wesley; Pearson Education Asia.

Hoffer, Jeffrey A., Joey F. George, and Joseph S. Valacich. Modern Systems Analysis and Design. Second edition. Reading, Mass. : New Delhi: Addison-Wesley; Pearson Education Asia, 2000.

Hoffer, Jeffrey A., et al. Modern Systems Analysis and Design. Second edition. Addison-Wesley; Pearson Education Asia, 2000.