Individuals are widely responsible for not only finding the images used in their published works but also for securing copyright permission to use them. Here are some tools to help you understand your responsibilities and rights
Art Research FAQ page from the Museum of Modern Art (MOMA) in NYC - FAQ page on art research at this museum's library; however, many of the tips can be used by anyone interested in conducting art research.
It is important that you cite your images just as you would cite any source that you use in a project or paper. Here is a link to a great guide to citing images in Chicago, MLA, and APA styles produced by Colgate University.