Just like in an academic essay, you need to consider the sources of your information and cite those sources as necessary. Although you can find just about anything you might need on the Web - images, songs, videos - these items were created by someone who should receive credit for the work. If you need to find source material on the web, do not just take copyrighted images or songs. Instead, try databases that house items licensed under Creative Commons, “a nonprofit corporation dedicated to making it easier for people to share and build upon the work of others, consistent with the rules of copyright.” If you find a copyrighted item that you would like to use, you can try contacting the creator to receive permission.
7 Tips for Citing an App in MLA Format If you have gotten any information from a mobile app or other online game, this is a good source for citation information.