Cite

When two ride upon one horse one must ride behind [graphic]

MLA

Heath, Henry, active 1824-1850, printmaker. When two ride upon one horse one must ride behind [graphic]. [approximately July 1830]. https://collections.library.yale.edu/catalog/33111834.

APA, 6th edition

Heath, Henry, active 1824-1850, printmaker. ([approximately July 1830])[When two ride upon one horse one must ride behind [graphic]]. https://collections.library.yale.edu/catalog/33111834.