Hoffer, J. A., George, J. F., & Valacich, J. S. (2002). Modern Systems Analysis & Design (3rd ed.). Pearson Education.
Lua i Stíl Chicago (17ú heag.)Hoffer, Jeffrey A., Joey F. George, agus Joseph S. Valacich. Modern Systems Analysis & Design. 3rd ed. New Delhi: Pearson Education, 2002.
Lua MLA (9ú heag.)Hoffer, Jeffrey A., et al. Modern Systems Analysis & Design. 3rd ed. Pearson Education, 2002.
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