Websites of "public domain" and "open access" image collections may in fact contain a mix of "free to use" images and images under copyright or requiring permission to use. As a precaution, check the usage information provided for each image.
Ownership determines usage permissions.
"Here are a few guidelines:
Give attribution to image creators in citations and credit statements to acknowledge authorship.
Indicate when using a personal photograph.
Include source information.
Citations to images included in image databases should include the following (or as much of it as can be easily determined from the source):
For more information on citing images, see