An accurate map of the country round Boston in New England ...
MLA
An Accurate Map of the Country Round Boston in New England ... A. Hamilton, 1776. https://collections.library.yale.edu/catalog/15654585.
APA, 6th edition
An accurate map of the country round Boston in New England ... (1776). [Maps]. A. Hamilton, https://collections.library.yale.edu/catalog/15654585.