Don't end your search at Google Images - but it can be a good starting point.
Use a library image database.
These will have high-quality images that will look good in your presentations, and come from verifiable sources.
Which museum or collections own the artwork you're studying?
You can sometimes find this information in Wikipedia. Use it wisely!
Look at the museum's website.
Look for pages or links like "image collections," "online collections," or "digital library"
Search artist's name and the phrase "catalogue raisonné" in SCAD Libraries.
Catalogues raisonnés are comprehensive listings of all known works by an artist, and might include images or tell you which museum or collection owns the work.
