folded sheet tutorial

Hi,
could you point me a tutorial to make a sheet with foldings like this
example?
http://www.saperdaesuentu.it/documenti/testamento-1943_II_foglio.JPG

Thanks

I personally use a plug-in called "Pixel Paper" for things like that because I'm lazy.

But it can be done manually. Here is a tutorial for doing it manually if you want it to look a little rougher (like your example) you'll have to do a little tinkering