We've included some links to image collections so that you can view them for your own reference. However, before reusing any images, be sure to check the copyright associated with each site!
Using an image without citing it is plagiarism, but citing it may not be enough. You may need to contact the copyright holder for permission, or in some cases, pay a fee.
You are responsible for complying with the copyright of each site. If you have any questions, please ask.