Secondary sources provide an analysis or interpretation of primary sources. Secondary sources often quote, explain, or otherwise use primary sources.
Keep in mind that primary sources are the original, raw materials of history. They are original documents, media, and objects that were created at the time under study. Primary sources share original thinking and new information.
Examples of secondary sources can include (but are not limited to):
This information is adapted from: https://umb.libguides.com/PrimarySources/secondary