Video Games Archived August 7, 2011, at the Wayback Machine GameDev.net - NPC Conversation Techniques Adventure Gamers : Callahan's Crosstime Saloon The Pages of Now & Forever - All About Star Control Rollings, Andrew; Ernest Adams (2006).
Video Games Arkiverad 7 augusti 2011 hämtat från the Wayback Machine. ^ GameDev.net - NPC Conversation Techniques ^ Adventure Gamers : Callahan's Crosstime Saloon ^ The Pages of Now & Forever - All About Star Control ^ Rollings, Andrew; Ernest Adams (2006).