If using an image from a Web site. Enter the word [image] in square brackets after the document title.
Citation styles provide guidelines for giving credit to sources you used. You need to intepret them for your situation. Images can be tricky. The websites listed below can help you. Sometimes, these sites give different intepretations. Check with your professor or the group in charge to see if he/she/they have a preference which one you use.
See section 1, chapter 4.2.9 Figures Reproduced or Adapted from Other Sources. Also read section 1 chapters 5.6.7 Copying, Reproducing, Adapting, and Other Uses of Content and 5.6.8 Ethical and Legal Considerations, Intellectual Property: Ownership, Access, Rights, and Management, Copyright Assignment, or License.
Chapter 3 References has general citation information.
For MLA: Use the creator as the author and follow normal in-text citation practices. Fill in as much information as you can using the new general format guidelines for your Works Cited page.
For APA: Use the creator as the author and follow normal in-text citation practices. Use Reference List information for Graphic Data (e.g. Interactive Maps and Other Graphic Representations of Data) or for Online Lecture Notes and Presentation Slides on the Electronic Resources tab, for Photograph (not associated with a museum) on the Audovisual Media tab, or for another format as appropriate.
For Chicago: Use Online Multimedia on the Web Sources tab or another format as appropriate.