1997 Chevy Malibu Wiper Arm and connecting

I have a 1997 Chevy Malibu and my wife had gone outside and and turned on the wipers to remove close to 6 inches of snow away from the windshield, ha ha ha, well afterwords now the passenger wiper arm seems to be competely snapped away from wiper rod, and the drivers side seems to be ok, now my question is how do I remove the wiper arm from the rod which connects to the wiper motor and where can I go both online on not to find my replacement parts, Thanks Doug