• ARTstor. Terms & Conditions of Use
• Library of Congress. Legal Notices 
• New York Public Library. Website Terms & Conditions and Research: Copies & Reproductions

Fair Use of Copyrighted Materials. Harper, Georgia. Crash Course in Copyright. University of Texas. Last updated 2020.

Statement on the Fair Use of Images for Teaching, Research, and Study. Visual Resources Association

• Topics include use of images for teaching purposes in the classroom, reproduction of images in theses and dissertations, use of images on course websites and in other online study materials, adaptation of images for teaching and classroom work by students. This statement has been endorsed by the Association of Research Libraries.

Code of Best Practices in Fair Use for the Visual Arts College Art Association of America

Citation Guides & Style Manuals. Smith College Libraries.
Includes a section on citing images of works of art and photographic illustrations.