Hi: Just now saw your request. It's after Christmas I know but this is also one of my favorite songs and I have been playing it for years. It actually dates back to the early 1960's by the original artist but the Eagles recorded it in 1978.
Go to www.E-Chords.com and register on their site and then type in the song title in their Search section. By the way the actual title of the song is "Please Come Home for Christmas" not Bells Will be Ringing. Good Luck.