Cite

A royal salute le cannon est en bas. [graphic]

MLA

Heath, William, 1795-1840, printmaker. A royal salute le cannon est en bas. [graphic]. [28 August 1820]. https://collections.library.yale.edu/catalog/33116229.

APA, 6th edition

Heath, William, 1795-1840, printmaker. ([28 August 1820])[A royal salute le cannon est en bas. [graphic]]. https://collections.library.yale.edu/catalog/33116229.