A primary source is a reliable first-hand account of a topic or event usually created at or near the time the event occurred or the topic was relevant. There are many different types of primary sources, including:
On the other hand, a secondary source is an account created later by someone who did not personally experience the topic or event being discussed. In most cases, secondary resources are created by researching primary sources and then using that evidence to analyze and summarize the topic or event. Examples of secondary sources are:
There are times when a secondary source can be used as a primary source. For example, an acting textbook using in a theatre class is generally considered to be a secondary source, because it looks at the general trends and first-hand accounts in the field of acting and summarizes them for students. However, when studying the history of acting the textbook can be used as a primary source to determine how acting was viewed during the time period in which it was written.