MLA

Fry, Joshua, 1700 (ca.)-1754, creator, Halifax, George Montagu-Dunk, Earl of, 1716-1771, Jefferson, Peter, 1708-1757, Jefferys, Thomas, d. 1771. A map of the most inhabited part of Virginia containing the whole province of Maryland: with part of Pensilvania, New Jersey and North Carolina. [1755]. https://collections.library.yale.edu/catalog/2040302.

APA, 6th edition

Fry, Joshua, 1700 (ca.)-1754, creator, & Halifax, George Montagu-Dunk, Earl of, 1716-1771, & Jefferson, Peter, 1708-1757, & Jefferys, Thomas, d. 1771. ([1755])[A map of the most inhabited part of Virginia containing the whole province of Maryland: with part of Pensilvania, New Jersey and North Carolina]. https://collections.library.yale.edu/catalog/2040302.