MLA

Fry, Joshua, approximately 1700-1754. 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, approximately 1700-1754. ([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.