MLA

Newton, William John, Sir, 1785-1869, printmaker. Joseph Richardson Esqr. barrister, and member for Newport in Cornwall / [graphic]. [1807]. https://collections.library.yale.edu/catalog/33191955.

APA, 6th edition

Newton, William John, Sir, 1785-1869, printmaker. ([1807])[Joseph Richardson Esqr. barrister, and member for Newport in Cornwall / [graphic]]. https://collections.library.yale.edu/catalog/33191955.