Bach's Six Little Preludes help

Once again I've found multiple versions of the same song(s). I was looking around for new stuff to play, and happened upon the first of six "little preludes." When I went searching for the others, I was surprised to find that the first prelude differed between 3 separate places... The first one I found had a midi to follow along, so I'll probably end up using that, but does anyone know which one is correct?


Any help would be much appreciated

Thanks,
Eric


Here's the first:
http://www.8notes.com/scores/10292.asp?ftype=gif

This one's a download, if you don't want to download it you can skip it
http://www.classical-sheet-music.eu/Easy_piano_music.html#Bach2

It's on page 12 of this bad beast:
http://pianophiles.com/sheetmusic/composers/b/bach/schirmer1895/bach_short_preludes_and_fugues.pdf

In the book I have "18 Short Preludes," the first one is listed as number 2 of "12 short preludes"

Two and three are what I have listed as number 1 of "Six short preludes" and are both the same, except that three has the realization of the ornaments written out instead of just the trill/mordent symbols. You can find some videos of this one on you tube if you search for "Bach BWV 933"

Fantastic, thanks a ton! Makes sense now