Cita APA (7th ed.)
Clifford, S. H., Coulthard, G. J., & Sawyer, S. C. (1994). DOS 5.0, WordPerfect 5.1, Lotus 1-2-3 (2.2 and 2.3), dBase IV. Irwin.
Cita Chicago (17th ed.)
Clifford, Sarah Hutchinson, Glen J. Coulthard, i Stacey C. Sawyer. DOS 5.0, WordPerfect 5.1, Lotus 1-2-3 (2.2 and 2.3), DBase IV. Burr Ridge, Ill.: Irwin, 1994.
Cita MLA (9th ed.)
Clifford, Sarah Hutchinson, et al. DOS 5.0, WordPerfect 5.1, Lotus 1-2-3 (2.2 and 2.3), DBase IV. Irwin, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.