Elliott, O. (1975). Programmed learning aid for Introduction to data processing. Learning Systems Co.
Cita Chicago (17th ed.)Elliott, Orville. Programmed Learning Aid for Introduction to Data Processing. Illinois: Learning Systems Co, 1975.
Cita MLA (9th ed.)Elliott, Orville. Programmed Learning Aid for Introduction to Data Processing. Learning Systems Co, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.