Duffy, T. (1992). Computing Concepts (2nd ed.). Wadsworth publishing Co..
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Tohutoru Kātū Chicago (17th ed.)
Duffy, Tim. Computing Concepts. 2nd ed. California: Wadsworth publishing Co., 1992.
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Tohutoro MLA (9th ed.)
Duffy, Tim. Computing Concepts. 2nd ed. Wadsworth publishing Co., 1992.
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