Marakas, G. M. (2001). Systems analysis and design. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Marakas, George M. Systems Analysis and Design. Prentice Hall, 2001.
Lua MLA (8ú heag.)Marakas, George M. Systems Analysis and Design. Prentice Hall, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.