Spencer, D. D. (1977). Introduction to information processing (Second edition.). Charles E. Merrill Publishing Company : A Bell and Howell company.
Citazione stile Chigago Style (17a edizione)Spencer, Donald D.. Introduction to Information Processing. Second edition. Columbus [i 3 pozostałe]: Charles E. Merrill Publishing Company : A Bell and Howell company, 1977.
Citatione MLA (9a ed.)Spencer, Donald D.. Introduction to Information Processing. Second edition. Charles E. Merrill Publishing Company : A Bell and Howell company, 1977.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.