Whitten, J. L., Bentley, L. D., & Dittman, K. C. (2001). Systems analysis and design methods (5th ed.). Irwin/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Whitten, Jeffrey L., Lonnie D. Bentley, agus Kevin C. Dittman. Systems Analysis and Design Methods. 5th ed. Boston, Mass.: Irwin/McGraw-Hill, 2001.
Lua MLA (8ú heag.)Whitten, Jeffrey L., et al. Systems Analysis and Design Methods. 5th ed. Irwin/McGraw-Hill, 2001.
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