Cita APA (7th ed.)

Grupe, F. H. (1990). Microcomputer applications: Using Wordperfect 5.0, Lotus 1-2-3, and dBASE III PLUS. W.C. Brown.

Cita Chicago (17th ed.)

Grupe, Fritz H. Microcomputer Applications: Using Wordperfect 5.0, Lotus 1-2-3, and DBASE III PLUS. Dubuque, IA: W.C. Brown, 1990.

Cita MLA (9th ed.)

Grupe, Fritz H. Microcomputer Applications: Using Wordperfect 5.0, Lotus 1-2-3, and DBASE III PLUS. W.C. Brown, 1990.