MLA

Wainwright, G. P., and printmaker. Dr. Zachary Grey from an Original Picture / [Graphic]. Published by Charles & Henry Baldwyn, Newgate Street, 0AD. https://collections.library.yale.edu/catalog/10977895.

APA, 6th edition

Wainwright, G. P., & printmaker. (0 C.E.). Dr. Zachary Grey from an original picture / [graphic] [Portrait prints, Chine collé prints, Engravings England London 1869]. Published by Charles & Henry Baldwyn, Newgate Street. https://collections.library.yale.edu/catalog/10977895.