When using materials created by someone else, always make sure you are not infringing on their rights. For guidance on how to cite an image see How to cite an image in MLA format.
In addition to legal rights, there are also ethical considerations about using other people's work.
Read more about copyright and ethical considerations on the Citizen DJ Copyright Guide.
For more information on usage rights, visit the Campus Guide to Copyright created by the Copyright Clearance Center. This guide was created to help students, instructors, faculty, and staff of U.S. based colleges and universities by offering background information about U.S. copyright law.
"Copyright is a type of intellectual property that protects original works of authorship as soon as an author fixes the work in a tangible form of expression. In copyright law, there are a lot of different types of works, including paintings, photographs, illustrations, musical compositions, sound recordings, computer programs, books, poems, blog posts, movies, architectural works, plays, and so much more!" - U.S. Copyright Office
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