Source: Shonn Haren, "An Infographic Explaining what a Primary Source Is, and Some of the Many Different Formats in which They Appear," .https://upload.wikimedia.org/wikipedia/commons/4/45/Primary_Sources.png.
Source: Shonn Haren. "An Infographic Explaining what a Secondary Source Is, and Some of the Many Different Formats in which They Appear," https://commons.wikimedia.org/wiki/File:Secondary_Sources.png