I'm currently designing a print flyer and I'm using quite a few statistics and a few quotes. Since space is at a minimum, and citing each individual statistic would require several lines of unsightly text (even at a small font). I'm wondering if it would be okay to cite a URL (which would never be changed or removed) where all of citations are located. In other words, is it okay to create a remote bibliography or works cited page? And yes, I would be adding superscripts and figure numbers so the corresponding citation could be found.
More info: The flyer has the possibility to be handed out (distributed) and also simply made available at various locations where people could pick up a flyer if they wish. This will be a promotional flyer for a non-partisan non-profit organization.