MLA

Phillips, R. (Richard), Sir, 1767-1840. A map of the country from Rariton River in East Jersey, to Elk Head in Maryland [cartographic material] : shewing the several operations of the American & British armies, in 1776 & 1777 / Neele sc., Strand.. [1806]. https://collections.library.yale.edu/catalog/16388926.

APA, 6th edition

Phillips, R. (Richard), Sir, 1767-1840. ([1806])[A map of the country from Rariton River in East Jersey, to Elk Head in Maryland [cartographic material] : shewing the several operations of the American & British armies, in 1776 & 1777 / Neele sc., Strand.]. https://collections.library.yale.edu/catalog/16388926.