Finding publicist info?

So lately I've been taking on some features related to the entertainment industry and getting a little out of my comfort zone. I can figure out who to contact when I'm trying to set up an interview with a sports figure, but I'm finding it more difficult to do so when it comes to musicians, authors, actors, etc.

Is there a good resource I'm missing? I haven't had great luck looking online with publishing houses, record companies, etc. Thanks for any help.

 

IMDb pro lists a lot of that info on the site. Some entertainers have managers and agents listed, too.