Harris, R. W. (1990). DOS, WordPerfect & Lotus office companion. Ventana Press.
Chicago Style (17th ed.) CitationHarris, Robert W. DOS, WordPerfect & Lotus Office Companion. S.l: Ventana Press, 1990.
MLA (9th ed.) CitationHarris, Robert W. DOS, WordPerfect & Lotus Office Companion. Ventana Press, 1990.
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