Erickson,Fritz J., & Vonk,John A. Computers: Consepts, implications and applications with Windows 3.1, WordPerfect 6.0 for Windows, Quarttro Pro 5.0 for Windows, and Paradox 4.5 for Windows. Dubuque (Ia.): Business and educational technologies.
Chicago-стиль цитированияErickson,Fritz J., and Vonk,John A. Computers: Consepts, Implications and Applications With Windows 3.1, WordPerfect 6.0 for Windows, Quarttro Pro 5.0 for Windows, and Paradox 4.5 for Windows. Dubuque (Ia.): Business and educational technologies.
MLA-цитированиеErickson,Fritz J., and Vonk,John A. Computers: Consepts, Implications and Applications With Windows 3.1, WordPerfect 6.0 for Windows, Quarttro Pro 5.0 for Windows, and Paradox 4.5 for Windows. Dubuque (Ia.): Business and educational technologies.