This is not a good photo. But I did it just to see if I could.
With a setup of 4 mirrors, I arranged them so I could use my camera to take a picture of its own back side.
I could have done it with 3 mirrors, but then all the text would have been reversed.
While it appears to be out of focus, that is actually a result of the extra "ghost" reflection caused by glass. Using 4 mirrors greatly intensified the effect.