A map of 100 miles round Boston [cartographic material].
MLA
A Map of 100 Miles Round Boston [Cartographic Material]. s.n., 1775. https://collections.library.yale.edu/catalog/15825330.
APA, 6th edition
A map of 100 miles round Boston [cartographic material]. (1775). [Maps]. s.n., https://collections.library.yale.edu/catalog/15825330.