Yes, you still have to cite the source even if you are getting from Wikipedia. There are still some people who think that Wikipedia has some of the best information that they can use. The reason why it is important to still cite the source is because it is illegal to get information online without acknowledging who has written it.
It will be considered plagiarism if you would try to pass the work as your own. Whether you are getting from Wikipedia, other social media sites like Facebook or Twitter, you still need to cite the source of the information just to be safe. You do not want to be accused of plagiarism, right?