MLA

Dean, T. A., and printmaker. William Beckford, Esq. [Graphic]. R. Bentley, 0AD. https://collections.library.yale.edu/catalog/15816322.

APA, 6th edition

Dean, T. A., & printmaker. (0 C.E.). William Beckford, Esq. [graphic] [Portrait prints, Steel engravings England London 1835]. R. Bentley. https://collections.library.yale.edu/catalog/15816322.