Cita APA (7th ed.)

Spencer, D. D. (1981). Introduction to information processing (3rd ed.). C.E. Merrill.

Cita Chicago (17th ed.)

Spencer, Donald D. Introduction to Information Processing. 3rd ed. Columbus, Ohio: C.E. Merrill, 1981.

Cita MLA (9th ed.)

Spencer, Donald D. Introduction to Information Processing. 3rd ed. C.E. Merrill, 1981.