APA (7th ed.) Citation

Yarnold, S. (2011). Upgrading and fixing a PC. In Easy Steps Limited.

Chicago Style (17th ed.) Citation

Yarnold, Stuart. Upgrading and Fixing a PC. United Kingdom: In Easy Steps Limited, 2011.

MLA (8th ed.) Citation

Yarnold, Stuart. Upgrading and Fixing a PC. In Easy Steps Limited, 2011.