MLA

Heath, Henry, active 1824-1850, printmaker. A pretty good crib this at starting "fifteen 2, fifteen 4, fifteen 6, and a pairs 8" [graphic].. [1850?]. https://collections.library.yale.edu/catalog/10972020.

APA, 6th edition

Heath, Henry, active 1824-1850, printmaker. ([1850?])[A pretty good crib this at starting "fifteen 2, fifteen 4, fifteen 6, and a pairs 8" [graphic].]. https://collections.library.yale.edu/catalog/10972020.