MLA

Dighton, Robert, 1752-1814, printmaker. Hold! Pizarro, hear me! If not always justly, at least act always greatly. Pizarro [graphic]. [14 December 1799]. https://collections.library.yale.edu/catalog/33185605.

APA, 6th edition

Dighton, Robert, 1752-1814, printmaker. ([14 December 1799])[Hold! Pizarro, hear me! If not always justly, at least act always greatly. Pizarro [graphic]]. https://collections.library.yale.edu/catalog/33185605.