something like this:
but more detailed with more frames preferably
and not just running
it doesn't matter if it's a book, or a site (preferably a site)
but just a general reference to video footage taken from good reference views like this side view?
I've googled a bit for some, I'll google some more later and post here if I find something before anyone else posts
Going back to the original question. Lucid, those pictures are from Eadweard Muybridge's pioneering photographic work from the late 1800's. His photographs are THE essential photographic animation reference for human and animal motion, even still to this day, as far as I know. Here are the books with the collections of his photographs: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Daps&field-keywords=muybridge
I own a copy of "The Human Figure in Motion" and it's a thick, extensive book, filled with complete sequences of photos like the one you posted. It has many many different male and female actions (walking, running, jumping, lifting, sitting, playing, etc), from different angles (side, front, some from back, 3/4, etc). You cannot go wrong with either that or "Animals in Motion". I believe that those two books cover Muybridge's entire collection of human and animal motion photographs.
Here's a little more about Muybridge: http://en.wikipedia.org/wiki/Muybridge
I think that the only way you can do better than his photos would be to shoot video for your own reference. If you choose to go this route, this open source video analysis software could come in handy: http://www.kinovea.org/en/