It looks like a cross between Comic and Lichtenstein...if you want a good representation a redraw is the only real option...most of the others i've seen look more like a low rez GIF that what you're after...if you're looking for a tutorial you can search for techniques to turn photos into line art and tweek from there...I found a decent tutorial that can get you started a smige ago...
tutorial comicbook it's more of a comic style but can be easily tweaked to give you the look you're after
if you'd like you can post *or email* a larger version and one of us would be glad to do it for ya...but i'm sencing you want to learn then just get it done