Citations can be formatted according to the citation style you are using (MLA, APA, Chicago Manual of Style). Using images that you did not create require citation in all cases and the citation should be accessible in the context of the image's use.
Here are a few basic 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):
- Creator's name;
- Title of the work, as given;
- Location of the work (museum, library or owning institution, if known);
- Database collection, if known;
- Rights information, if known.
For detailed, up-to-date guidelines on in-text and bibliographic citations of images, visit this guide.