== References ==== External links ==* comp.games.development.industry (Google Groups)* International Game Developers Association* Playing the Game: The Economics of the Computer Game Industry (Cambridge University Press)* Sloperama: Game Biz Advice (Tom Sloper)
* comp.games.development.industry (گروه‌های گوگل)* International Game Developers Association* Playing the Game: The Economics of the Computer Game Industry (انتشارات دانشگاه کمبریج)* Sloperama: Game Biz Advice (Tom Sloper)* German Game Portal