MLA

Heath, William, 1795-1840, printmaker. The Hampshire green bag opened, or, The secret spring of ultra-loyal addresses, discovered and exposed [graphic].. [January 1821]. https://collections.library.yale.edu/catalog/33245985.

APA, 6th edition

Heath, William, 1795-1840, printmaker. ([January 1821])[The Hampshire green bag opened, or, The secret spring of ultra-loyal addresses, discovered and exposed [graphic].]. https://collections.library.yale.edu/catalog/33245985.