There seems to be a disagreement about the question of the referendum
According to the greek government it is about the extent and the nature of the austerity measures.If that's the case then I vote "NO" .Don't get me wrong, I believe the greek state is in need of reforms and measures, but I'm not convinced that the last 5 years were anything but a disaster for the greek economy and its ability to repay its debts.So if the recipe stays the same, things will only get worse, and believe me, things are really bad as they are right now.
According to the rest of the eurozone the question should be something like "do you prefer to be a member of the eurozone or would you like to become an isolated state?" , and the answer to that question is "I prefer the eurozone".