MLA

Elmes, William, active 1797-1820, printmaker. The horrid torture of impalment [sic] alive as a punishment on runaway slaves [graphic]. Sep. 9, 1808.. https://collections.library.yale.edu/catalog/16731098.

APA, 6th edition

Elmes, William, active 1797-1820, printmaker. (Sep. 9, 1808.)[The horrid torture of impalment [sic] alive as a punishment on runaway slaves [graphic]]. https://collections.library.yale.edu/catalog/16731098.