Thread:Epic146/@comment-3528596-20171017023344/@comment-104549-20171028025350

Well, as you've probably seen in the tutorial (specifically this section), Google Images isn't an acceptable source itself. You have to trace the image back to its first appearance.

A great way to find a lot of images you see in Google Images (and the technique I use often when hunting down original images users claim to have created themselves) is to:
 * 1) Right-click the image.
 * 2) Click "View image"
 * 3) When that pops up (should be the image on a gray background), copy the link from the taskbar.
 * 4) Go to Google.com.
 * 5) Switch to Google Images search.
 * 6) Click the little camera graphic that says "Search by image".
 * 7) Paste the link and search.

Often, the original source will appear in the resulting list of images; a lot of fanart is taken (read: stolen) from DeviantArt, so a DA link will often be the original source. If it's uploaded to Pinterest, you can sometimes see the original source either in the description or by mousing over the image itself.

Hopefully this will help you track down some elusive sources.