"Why not try a google search for modeling sites?"

That's what I've been doing so far to find the pose. However, it takes quite a bit of time trying to search for that right pose and the angle of the picture. I usually end up spending majority of time searching because I am kind of picky about this. That's why I was asking for the website that hosts reference pictures so I can quickly search by the index or titles.

And thanks to you all for helping me out, those links are very useful, and I'll be sure to look into those reference books also.