Cita APA (7a ed.)

Sheldon, G. (1992). WordPerfect for windows at work. Addison-Wesley.

Cita Chicago Style (17a ed.)

Sheldon, George. WordPerfect for Windows at Work. Reading, Massachusetts [etc.]: Addison-Wesley, 1992.

Cita MLA (9a ed.)

Sheldon, George. WordPerfect for Windows at Work. Addison-Wesley, 1992.