Cite

[Playing card, two of hearts made into two faces] [art original]

MLA

Jenison-Walworth, Mary, Countess, 1766-1851, artist. [Playing card, two of hearts made into two faces] [art original]. [1788]. https://collections.library.yale.edu/catalog/33207465.

APA, 6th edition

Jenison-Walworth, Mary, Countess, 1766-1851, artist. ([1788])[[Playing card, two of hearts made into two faces] [art original]]. https://collections.library.yale.edu/catalog/33207465.