MLA

Darjou, Alfred-Henri, 1832-1874, printmaker. Le congrès de pharmacie [graphic]. [not after 1874]. https://collections.library.yale.edu/catalog/17339100.

APA, 6th edition

Darjou, Alfred-Henri, 1832-1874, printmaker. ([not after 1874])[Le congrès de pharmacie [graphic]]. https://collections.library.yale.edu/catalog/17339100.