Shelly, G. B., & Rosenblatt, H. J. (2012). Systems analysis and design (9th ed.). Course Technology Cengage Learning.
Lua i Stíl Chicago (17ú heag.)Shelly, Gary B., agus Harry J. Rosenblatt. Systems Analysis and Design. 9th ed. Boston: Course Technology Cengage Learning, 2012.
Lua MLA (9ú heag.)Shelly, Gary B., agus Harry J. Rosenblatt. Systems Analysis and Design. 9th ed. Course Technology Cengage Learning, 2012.
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