Here is the information you need to properly cite a digital image or photograph:
Creator’s Last name, First name. “Title of the digital image.” Title of the website, First name, Last name of any contributors, Version (if applicable), Number (if applicable), Publisher, Publication date, URL.
Vasquez, Gary A. Photograph of Coach K with Team USA. NBC Olympics, USA Today Sports, 5 Aug. 2016, www.nbcolympics.com/news/rio-olympics-coach-ks-toughest-test-or-lasting-legacy.
If the digital image does not have a title, include a description of the image. Do not place this information in quotation marks or italics.
If the picture was found using Google Images, do not cite Google Images as the publisher. Instead, click on the picture and use the information from the website that is hosting the picture.
Not all Google images are copyright free. To find a Google image that you can legally copy, go to Google Images and enter a search term. When the results are returned, click on Search Tools, then Usage Rights. Use the pull-down menu to make the appropriate selection.