I'm going in to my 4th year in college and I've taken multiple classes on research methods and ****. I use wikipedia and the databases we can access on our school's website. It's way more efficient than wasting my time searching through hundreds of pages in a book to find one small bit of information. There hasn't been one time where I've gone to the library and actually used a book source.
The thing that really pisses me off is when professors require book sources. If I can find all my information using technology, why should I have to go and use some outdated ******** that's going to waste more of my time to find the same information? Most of the time, I just go on amazon and find a few books and just put random citations in. They can't even tell.
Now I understand that you don't want to use wikipedia on a huge thesis project or something, but for the ******** 3-5 page papers that professors love to assign, wikipedia is definitely a reliable source.