MLA

DeCusati, Emiddio, et al. Elihu Hubbard Smith Portrait. 0AD. https://collections.library.yale.edu/catalog/16787945.

APA, 6th edition

DeCusati, E., Sharples, J., & Gallery, Y. A. (0 C.E.). Elihu Hubbard Smith portrait [Painting]. https://collections.library.yale.edu/catalog/16787945.