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Please consider using the Starting Your Research tutorial to learn the phases and processes of doing research.
Background sources are used to provide context to your paper. ex: textbooks, encyclopedias.
***Argument sources are used to find arguments, theories, research, that you will discuss and engage with. ex: scholarly article Argument Sources are the main type of sources you will need for your longer research paper.
Evidence sources are used to find evidence, data, or original content to support your arguments. ex: government records, data, news.
Your research paper will require Argument Sources (secondary, scholarly sources) and perhaps some evidence sources. Background Sources may be helpful as well.