MLA

Dean, T. A., and printmaker. [William Beckford, Esq.] [Graphic]. R. Bentley, 0AD. https://collections.library.yale.edu/catalog/15816319.

APA, 6th edition

Dean, T. A., & printmaker. (0 C.E.). [William Beckford, Esq.] [graphic]. [Portrait prints, Book illustrations England London 1835, Steel engravings England London 1835, Proofs]. R. Bentley. https://collections.library.yale.edu/catalog/15816319.