Great! I like Epidermix 372 epoxy, traditionally hide glue is used, but I wouldn't recommend that unless you've had some practice working with it before.
Clean off the finish under the bridge (the reason most bridges come loose in the first place is because they are glued to the finish) - you can mask off and use a stripper (my preference) or scrape and sand. Rough up the underside of the bridge, mask off if you haven't already, apply a thin layer of glue and clamp. Clean up glue squeeze-out once or twice over the next hour and leave overnight.
Clean off the finish under the bridge (the reason most bridges come loose in the first place is because they are glued to the finish) - you can mask off and use a stripper (my preference) or scrape and sand. Rough up the underside of the bridge, mask off if you haven't already, apply a thin layer of glue and clamp. Clean up glue squeeze-out once or twice over the next hour and leave overnight.