Cita APA (7th ed.)

Callaghan, D. R. (1992). A Modular approach to MS-DOS, Wordstar version 6.0, Lotus 1-2-3 version 2.2, and dBase IV. Wm. C. Brown Publishers.

Cita Chicago (17th ed.)

Callaghan, David R. A Modular Approach to MS-DOS, Wordstar Version 6.0, Lotus 1-2-3 Version 2.2, and DBase IV. Dubuque, IA: Wm. C. Brown Publishers, 1992.

Cita MLA (9th ed.)

Callaghan, David R. A Modular Approach to MS-DOS, Wordstar Version 6.0, Lotus 1-2-3 Version 2.2, and DBase IV. Wm. C. Brown Publishers, 1992.