Just as you acknowledge the ideas of others in the verbal portion of your speech, be sure to credit such material used in any accompanying presentation aids. When reproducing copyrighted material, such as a table or photograph, clearly label it with a copyright symbol (©) and the source information. Even if it is not copyrighted, supporting material listed on a visual aid requires citation. You may cite this material orally, print the citation unobtrusively on the aid, or both.