Grupe, F. H. (1990). Microcomputer applications: Using WordPerfect 5.0, Lotus 1-2-3, and dBase III Plus. W.C. Brown.
Chicago Style (17th ed.) CitationGrupe, Fritz H. Microcomputer Applications: Using WordPerfect 5.0, Lotus 1-2-3, and DBase III Plus. Dubuque, Iowa: W.C. Brown, 1990.
MLA (9th ed.) CitationGrupe, Fritz H. Microcomputer Applications: Using WordPerfect 5.0, Lotus 1-2-3, and DBase III Plus. W.C. Brown, 1990.
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