MLA

Maddocks, W., and printmaker. Jack Sheppard [Graphic]. publisher not identified, 0AD. https://collections.library.yale.edu/catalog/10968834.

APA, 6th edition

Maddocks, W., & printmaker. (0 C.E.). Jack Sheppard [graphic] [Portrait prints, Stipple engravings England 1819]. publisher not identified. https://collections.library.yale.edu/catalog/10968834.