Ayres, R. P. D. (1998). The essence of professional issues in computing. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Ayres, Robert Ph. D. The Essence of Professional Issues in Computing. New York: Prentice Hall, 1998.
Lua MLA (9ú heag.)Ayres, Robert Ph. D. The Essence of Professional Issues in Computing. Prentice Hall, 1998.
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