MLA

Charlotte at the Grave of Werter [Graphic]. Pubd. Jany. 1, 178[...?] by S.W. Fores at the Caracature Warehouse No.3 Piccadilly, 0AD. https://collections.library.yale.edu/catalog/10731181.

APA, 6th edition

Charlotte at the grave of Werter [graphic]. (0 C.E.). [Parodies, imitations, etc, Satires (Visual works) England 1786, Etchings England London 1786]. Pubd. Jany. 1, 178[...?] by S.W. Fores at the Caracature Warehouse No.3 Piccadilly. https://collections.library.yale.edu/catalog/10731181.