LEE, B. (1985). Introducing Systems Analysis And Design Barry Lee. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)LEE, Barry. Introducing Systems Analysis And Design Barry Lee. John Wiley & Sons, 1985.
Lua MLA (8ú heag.)LEE, Barry. Introducing Systems Analysis And Design Barry Lee. John Wiley & Sons, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.