Typically, images are not cited in the bibliography. Rather the information necessary to locate an image is included in an image caption. When formatting image citations in MLA style, follow the guidelines below and reference the MLA handbook (2021):
Fig Number. Artist/Creator. Title. Date. Materials. Measurements, Repository/location. Source, Access Date, URL/DOI. Credit Line.
Fig. XI. Alice Neel. Harold Dyker. 1971, oil on canvas, Artists Collection. Reed Digital Collections, 12, April 2017, rdc.reed.edu/i/00bc7844-5a14-4fa1-9aea-3cfa012d4e7f.
Image © Estate of Alice Neel.
Fig Number. Artist/Creator. Title. Date. Materials. Measurements. Repository/location; Title of Book, contributors, publisher, page. Credit Line.
Fig. 4. Frank Duveneck, Portrait of Maggie Wilson, oil on board, 38.10 x 30.48 cm, Museum of Fine Arts, Houston, Texas; Unsuspected Genius: the Art and Life of Frank Duveneck, by Robert Neuhaus, Bedford Press, 227. Image in public domain.
Fig Number. Artist/Creator. Title. Date. Materials. Measurements. Repository/location. Access Date, URL/DOI. Credit Line.
Fig. XI. Elizabeth Murray. Terrifying Terrain. 1989-90. oil on shaped canvases. 84 1/2 x 85 x 11 inches. Metropolitan Museum of Art, New York. Web. 12, April 2017, www.metmuseum.org/art/collection/search/485914. © Estate of Elizabeth Murray.