Primary Sources:
Immediate, first-hand accounts of a topic, from people who had a direct connection with it. Primary sources can include:
Texts of laws and other original documents.
Newspaper reports, by reporters who witnessed an event or who quote people who did.
Speeches, diaries, letters and interviews - what the people involved said or wrote.
Original research.
Datasets, survey data, such as census or economic statistics.
Photographs, video, or audio that capture an event.
Taken From: The Healy Library: University of Massachusetts Boston
Secondary Sources
One step removed from primary sources, though they often quote or otherwise use primary sources. They can cover the same topic, but add a layer of interpretation and analysis. Secondary sources can include:
Most books about a topic.
Analysis or interpretation of data.
Scholarly or other articles about a topic, especially by people not directly involved.
Documentaries (though they often include photos or video portions that can be considered primary sources).
Taken from: Healey Library: University of Massachusetts: Boston