Easy steps to searching the web
The first place you will go to is a subscription database, which will have the most realiable information because it is payed for. An example would be a Infohio.com.
The second place you will go is to a subject directory which is not paid for but, at least is checked by actual people. An example would be Kidrex.
The last place to search is a search engien like google and internet explorer. Which is not checked by anything besides robots or search spiders.
How to find out if it's true
If you find a widsite that seems like it's not telling the truth, then you should go to an other website and if they're differant go to an other website and continue the prossess if needed.