MLA

Pigal, Edmé Jean, 1798-1872, printmaker. Ça va bien!! [graphic]. [not after 1872]. https://collections.library.yale.edu/catalog/17339502.

APA, 6th edition

Pigal, Edmé Jean, 1798-1872, printmaker. ([not after 1872])[Ça va bien!! [graphic]]. https://collections.library.yale.edu/catalog/17339502.