To accurately cite images in reports, the following is needed:
In line citations as you are talking about the work. (Artist's name and Title of the work)
After your Citation's page with full reference information, you will also have a List of Images page. Here you will list all of the information that is known. (Artist name (nationality and dates of birth and death if helpful), Title of the work, Year(s) of completion, Dimensions and media, where relevant, Ownership and or location, Source from which the image was scanned or downloaded)