MLA

Harlequin Skeleton [Graphic]. Publish'd as the act directs, Marh. [the] 23rd 1772 by Robt. Sayer, Map & Printseller, No. 53 in Fleet Street, 0AD. https://collections.library.yale.edu/catalog/10715866.

APA, 6th edition

Harlequin skeleton [graphic]. (0 C.E.). [Caricatures and cartoons, Satires (Visual works) England 1772, Etchings England London 1772, Watermarks (Paper) H. B.]. Publish'd as the act directs, Marh. [the] 23rd 1772 by Robt. Sayer, Map & Printseller, No. 53 in Fleet Street. https://collections.library.yale.edu/catalog/10715866.