YSRnRY: Summit Softography and reviews of some of their games. http://www.ysrnry.co.uk/bycompany/Summit.htm

Adventureland: Summit Software Short company information and a detailed list of the adventures they have published. http://www.if-legends.org/~adventure/Summit_Software.html

GameStage: Summit Software Detailed description of the company, as well as their released titles, including the game's genre, year of release, developer(s) and publisher(s). http://gamestage.topcities.com/zx-summit.html

Adventureland: Alpine Short company information and a detailed list of the adventures they have published. http://www.if-legends.org/~adventure/Alpine.html

YSRnRY: St Brides School Softography and reviews of some of their games. http://www.ysrnry.co.uk/bycompany/St_Brides_School.htm