Purdue OWL Image Citation Guide: MLA
Reed College image workstation: Provides citation help for several styles
University of California-Irvine: Comprehensive Visual Literacy LibGuide
University of California-Irvine: MLA Image Citation LibGuide
University of California-Irvine: APA Image Citation LibGuide
University of Maryland Image Citation Guide: MLA
Trinity College Image Citation Guide: Chicago Manual of Style
Yale University: Comprehensive LibGuide to digital image resources
Thanks to Lee Sorensen, Visual Studies Librarian at Duke University for this resource list.