APA (7th ed.) Citation

Elliott, O. (1975). Programmed learning aid for Introduction to data processing. Learning Systems Co.

Chicago Style (17th ed.) Citation

Elliott, Orville. Programmed Learning Aid for Introduction to Data Processing. Illinois: Learning Systems Co, 1975.

MLA (9th ed.) Citation

Elliott, Orville. Programmed Learning Aid for Introduction to Data Processing. Learning Systems Co, 1975.