If you use images from the web, make sure you are not breaking copyright law. You can ask permission from the source or use images that are licensed as Creative Commons. In addition, government images usually fall in the public domain and are free from copyright.

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You will need to attribute all image that are not yours or not in the public domain.

• Attributing Creative Commons images

If you borrow images you didn't create that are not creative commons or public domain, they are most likely protected by copyright or you will need to get permission by the original creator to use them.