MLA

Mitchell, John, 1711-1768. A map of the British colonies in North America : with the roads, distances, limits, and extent of the settlements, humbly inscribed to the Right Honourable the Earl of Halifax, and the other Right Honourable the Lords Commissioners for Trade & Plantations. BRBL_00363. [1775?]. https://collections.library.yale.edu/catalog/15534643.

APA, 6th edition

Mitchell, John, 1711-1768. (["BRBL_00363"])([1775?])[A map of the British colonies in North America : with the roads, distances, limits, and extent of the settlements, humbly inscribed to the Right Honourable the Earl of Halifax, and the other Right Honourable the Lords Commissioners for Trade & Plantations]. https://collections.library.yale.edu/catalog/15534643.