Birleşik Krallık merkezli video oyunu şirketleri
- en.wikipedia.org List of Bullfrog Productions games
- facebook.com people/Bullfrog-Productions/…
- guildford.games developers/bullfrog-productions
- gamesnostalgia.com games/developer/Bullfrog …
- gamepressure.com games/game-company.asp…
- videogamegeek.com videogamepublisher/12783/…
- classicreload.com publisher/bullfrog productions…
- mobygames.com company/100/bullfrog-productions-…
- wiki.popre.net Bullfrog
- memim.com bullfrog-productions.html
- playclassic.games developer/bullfrog-productions-…
- segaretro.org Bullfrog_Productions