- Author: Paul F. Gordon, Peter Gregory
- Language: English
- Year: 1984
- Author: Peter Gregory, Claire March, Suzy Tutchell
- Language: English
- Year: 2020
- Author: Peter Gregory
- Language: English
- Year: 2022
- Author: Peter Gregory
- Language: English
- Year: 2022
- Author: Peter Gregory Bobby Rogers Dawn Dunkerley
- Language: English
- Year: 2022
- Author: Peter Gregory Bobby Rogers Dawn Dunkerley
- Language: English
- Year: 2022
- Author: Peter Gregory
- Language: English
- Year: 2021
- Author: Peter Gregory CISA CISSP
- Language: English
- Year: 2004