Scholarly research, trade journals, and popular news/magazines covering all disciplines. A good place to start for most research topics. (An expanded version of Academic Search Premier.)
Reference sources can be a great starting point for research. Reference sources typically provide definitions, give topic overviews, and explain theories. They can also point to additional readings and scholarship. Examples of reference sources include: dictionaries, encyclopedias, handbooks, guidebooks, manuals, and textbooks.