Harris, R. W. (1992). DOS, WordPerfect and Lotus office companion (2nd ed.). Chapel Hill, NC.: Ventana Press.
Παραπομπή Chicago StyleHarris, Robert W. DOS, WordPerfect and Lotus Office Companion. 2nd ed. Chapel Hill, NC.: Ventana Press, 1992.
Παραπομπή MLAHarris, Robert W. DOS, WordPerfect and Lotus Office Companion. 2nd ed. Chapel Hill, NC.: Ventana Press, 1992.
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