Secondary sources are more generalworks based on the primary literature.
It includes textbooks,encyclopedias, dictionaries, and popular magazines such as Discover,Natural History, Scientific American, Audubon, and Smithsonian. Any time you use information that originated with someoneelse, you must cite that source. Citations are acknowledgmentsin the text of the paper that show the originator of the ideaor information. They should use the following format dependingon the number of authors of the paper. This tells the reader that you got your information from thesepapers.