MLA

Wright, James, 1745-1820, printmaker. Ignatius Sancho [graphic]. [not after 1820]. https://collections.library.yale.edu/catalog/15809059.

APA, 6th edition

Wright, James, 1745-1820, printmaker. ([not after 1820])[Ignatius Sancho [graphic]]. https://collections.library.yale.edu/catalog/15809059.