Cita APA (7a ed.)

Safari Tech Books Online & Preston, W. C. A. (1999). Unix backup and recovery. O'Reilly.

Cita Chicago Style (17a ed.)

Safari Tech Books Online y W. Curtis Author Preston. Unix Backup and Recovery. [Place of publication not identified]: O'Reilly, 1999.

Cita MLA (9a ed.)

Safari Tech Books Online y W. Curtis Author Preston. Unix Backup and Recovery. O'Reilly, 1999.