Arguments in different fields look different, but they all consist of answers to just these five questions:
What are you claiming?
What are your reasons?
What evidence supports your reasons?
But what about other points of view?
What principle makes your reasons relevant to your claim?
Source: A Manual for Writers by Kate Turabian, 8th edition, pages 50-62.
Evidence is the information you use to support your argument. It's also the information that you cite. Your evidence can be in a variety of formats and come from several different places.
Format
Locating Evidence
Based on Evidence, created by The Writing Center, University of North Carolina at Chapel Hill
• Find background information in reference resources such as Credo.
• Collect data through interviews and field research.
• Find statistics about the topic.
• Look at opinions on both sides of the issue in resources such as CQ Researcher.
• Search Multidisciplinary databases first such as Academic Search Complete and JSTOR, then move to specialized databases depending on your topic.