How recent? The more recent, the better, but all sources can take time to published. Sources older than 5 years should not generally be used unless you are discussing a historical section.
This assignment presents a unique challenge because you should NOT cite to or use empirical articles (primary sources). nstead, secondary sources that have come to a general consensus on a topic should be used.The best way to tell if an article is a primary source is to check the Methodology section; a primary source will describe a very specific and narrow population while a secondary source that summarizes several sources will explain the process for locating articles. Statistics from a reliable source may be used, although statistics are generally considered primary sources.
Remember that Open Access articles are preferred. You can filter for Open Access in the left "Limit To" box on the left, but doing so might limit your results too much.
Search for your term, then use the Review and Systematic Reviews filter on the left. Note that just adding the types to the article types to the menu is not sufficient, there must be a blue check next to the name:
From the Wikipedia Identifying reliable sources page, here are some other guidelines to consider:
In addition to not plagiarizing material, there are also copyright concerns with Wikipedia. Remember to follow these basic guidelines:
