Basically it is a very reliable source as much information on any topic is referenced from Wikipedia.
On the other hand it’s best NOT to use a Wikipedia article as a foolproof source. Wikipedia can be edited by anyone at any time. This means that any information it contains at any particular time could be vandalism, a work in progress, or just plain wrong.
It’s open source and many articles can be changed.
in Howto
Here is why Wikipedia is not a reliable source
