You must use media that is either of your own creation or that is available for you to use without getting the copyright holder's permission. This page will help you do that!
The Creative Commons search is through Openverse. The tool allows you to search for images, music, video, and other media that have been given a Creative Commons license or are in the public domain.
The Noun Project is a place to find free icons. After creating a free account, you can use almost all icons for no cost, but you must give credit to the creator on the image. You can also purchase royalty free icons for $1.99.
This is a very good place to find minimalistic, but high-impact, images.
While the Creative Commons is a great place to go for items with a reuse license, here are some other sites you can use to find images in the public domain:
You still have to cite items you find in the Creative Commons. In fact, one condition of all CC licenses is attribution. For citing items from the Creative Commons, refer to their "Best Practices for Attribution" page.
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This work, "90fied", is a derivative of "Creative Commons 10th Birthday Celebration San Francisco" by tvol, used under CC BY. "90fied" is licensed under CC BY by [Your name here].
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You can find more information on UAB's MLA Style guide.
MLA 8th Edition
For information on how to document within your genre, refer to pp. 96-97 in your Writer's Reference, 9th edition.
