MLA

Sherwin, J. K. (John Keyse), 1751-1790, printmaker. Roxalana [graphic]. [1 February 1791]. https://collections.library.yale.edu/catalog/33191837.

APA, 6th edition

Sherwin, J. K. (John Keyse), 1751-1790, printmaker. ([1 February 1791])[Roxalana [graphic]]. https://collections.library.yale.edu/catalog/33191837.