MLA

Beckwith, J. Carroll., and R. G. Tietze. Portrait of Jean-Francois Millet. Plate XXVI. Charles Scribner's Sons, 1894. https://collections.library.yale.edu/catalog/2012029.

APA, 6th edition

Beckwith, J. C., & Tietze, R. G. (1894). Portrait of Jean-Francois Millet. Plate XXVI [Illustrations]. Charles Scribner's Sons. https://collections.library.yale.edu/catalog/2012029.