Images require citations just like articles and books, even if they are made available openly on the web! If you use an image in a presentation or paper, you need to give credit. and always credit the site from which you took the image.
A proper MLA 8 citation for an image of an original work of art taken off the internet contains the following information:
Artist’s last name, first name. Title of artwork. Date of composition. Name of institution/private collection housing artwork. Title of database or website. <URL>. Date of access.
If you are creating a less formal presentation or using an image on a blog or other online source where MLA 8 is not required, provide as much of the information as you can and always give credit to the creator/website and provide the URL for the image.
