Cita APA (7a ed.)

(2003). Microsof Windows xp (NULL.). Mc Graw Hill.

Cita Chicago Style (17a ed.)

Microsof Windows Xp. NULL. Madrid: Mc Graw Hill, 2003.

Cita MLA (8a ed.)

Microsof Windows Xp. NULL. Mc Graw Hill, 2003.