Cite

The doctor's best companion [graphic]

MLA

Heissig, Franz Carl, active 1770, printmaker. The doctor's best companion [graphic]. [1770]. https://collections.library.yale.edu/catalog/17339299.

APA, 6th edition

Heissig, Franz Carl, active 1770, printmaker. ([1770])[The doctor's best companion [graphic]]. https://collections.library.yale.edu/catalog/17339299.