Cita APA (7a ed.)

Norton, P., & Nielsen, P. (1993). Norton Antivirus. Prentice Hall.

Cita Chicago Style (17a ed.)

Norton, Peter, y Paul Nielsen. Norton Antivirus. México: Prentice Hall, 1993.

Cita MLA (9a ed.)

Norton, Peter, y Paul Nielsen. Norton Antivirus. Prentice Hall, 1993.