MLA

Russell, John, fl. 1733-1795. Map of the northern, or, New England states of America. Comprehending Vermont, New Hampshire, District of Main, Massachusetts, Rhode-Island, and Connecticut. 1795 February 7. https://collections.library.yale.edu/catalog/2000470.

APA, 6th edition

Russell, John, fl. 1733-1795. (1795 February 7)[Map of the northern, or, New England states of America. Comprehending Vermont, New Hampshire, District of Main, Massachusetts, Rhode-Island, and Connecticut]. https://collections.library.yale.edu/catalog/2000470.