Spencer, D. D. (1977). Introduction to information processing (Second edition.). Charles E. Merrill Publishing Company : A Bell and Howell company.
Chicago-Zitierstil (17. Ausg.)Spencer, Donald D.. Introduction to Information Processing. Second edition. Columbus [i 3 pozostałe]: Charles E. Merrill Publishing Company : A Bell and Howell company, 1977.
MLA-Zitierstil (9. Ausg.)Spencer, Donald D.. Introduction to Information Processing. Second edition. Charles E. Merrill Publishing Company : A Bell and Howell company, 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.