How to remove a power steering pump

I have a 1993 Buick LeSabre with a 3.8L V6 engine. There's a power steering leak coming from the bottom of the pump and onto the serpentine belt. The car started changing from 1st gear to 2nd roughly. The belt slipped off. I replaced it and didnt put power steering fluid in and drove it 2 miles and the be slipped off again but this time it was split down the middle. I need to know where the leak could be possibly coming from and will the rough driving stop once the problem is fixed?