POPPEL HARVEY L. (1987). INFORMATION TECHNOLOGY: THE TRILLION DOLLAR OPPORTUNITY. MCGRAW-HILL.
Lua i Stíl Chicago (17ú heag.)POPPEL HARVEY L. INFORMATION TECHNOLOGY: THE TRILLION DOLLAR OPPORTUNITY. NEW YORK: MCGRAW-HILL, 1987.
Lua MLA (9ú heag.)POPPEL HARVEY L. INFORMATION TECHNOLOGY: THE TRILLION DOLLAR OPPORTUNITY. MCGRAW-HILL, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.