Whitten, J. L. (2001). Systems analysis and design methods. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Whitten, Jeffrey L. Systems Analysis and Design Methods. McGraw-Hill, 2001.
Lua MLA (8ú heag.)Whitten, Jeffrey L. Systems Analysis and Design Methods. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.