Cita APA (7th ed.)

Preston, J. M. (2000). Learn office 2000. Prentice Hall.

Cita Chicago (17th ed.)

Preston, John M. Learn Office 2000. Upper Saddle River, N.J: Prentice Hall, 2000.

Cita MLA (9th ed.)

Preston, John M. Learn Office 2000. Prentice Hall, 2000.