MLA

Feckert, Gustav Heinrich Gottlob, 1820-1899, printmaker. Die Verunglükte Medizin [graphic]. [not after 1899]. https://collections.library.yale.edu/catalog/17338349.

APA, 6th edition

Feckert, Gustav Heinrich Gottlob, 1820-1899, printmaker. ([not after 1899])[Die Verunglükte Medizin [graphic]]. https://collections.library.yale.edu/catalog/17338349.