Cite

He saw an apothecary on a white horse ... [graphic]

MLA

Landseer, Thomas, 1795-1880, printmaker. He saw an apothecary on a white horse ... [graphic]. [1 January 1831]. https://collections.library.yale.edu/catalog/17338362.

APA, 6th edition

Landseer, Thomas, 1795-1880, printmaker. ([1 January 1831])[He saw an apothecary on a white horse ... [graphic]]. https://collections.library.yale.edu/catalog/17338362.