MLA

Jefferys, Thomas, -1771, printmaker. A map of the most inhabited part of Virginia containing the whole province of Maryland with part of Pensilvania, New Jersey and North Carolina / drawn by Joshua Fry & Peter Jefferson in 1751.. BRBL_00507. 1755. https://collections.library.yale.edu/catalog/15811233.

APA, 6th edition

Jefferys, Thomas, -1771, printmaker. (["BRBL_00507"])(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 / drawn by Joshua Fry & Peter Jefferson in 1751.]. https://collections.library.yale.edu/catalog/15811233.