MLA

William Beckford Esqr Author of Histories of France & Jamaica / [Graphic]. Pubd. by Vernor & Hood, 31 Poultry, 0AD. https://collections.library.yale.edu/catalog/15816338.

APA, 6th edition

William Beckford Esqr author of histories of France & Jamaica / [graphic]. (0 C.E.). [Portrait prints, Periodical illustrations, Stipple engravings England London 1799, Annotations (Provenance) 18th century]. Pubd. by Vernor & Hood, 31 Poultry. https://collections.library.yale.edu/catalog/15816338.