Technically, the Greek constitution only allows the president to issue a referendum, and only on non-financial matters, as GlobalPost's Michael Goldfarb has written. But that hasn't stopped the prime minister from announcing the referendum. Nor has it stopped many from speculating what exactly the referendum will ask, and what impact it will have on Greece.
What do you think the referendum will ask? Click through the slideshow to see a few options and leave your vote in the comments section below.
More: Papandreou goes rogue