MLA

Magnus, Charles. Complete Map of the Cities of New York, Brooklyn and Williamsburgh [Cartographic Material]. C. Magnus, 0AD. https://collections.library.yale.edu/catalog/15761127.

APA, 6th edition

Magnus, C. (0 C.E.). Complete map of the cities of New York, Brooklyn and Williamsburgh [cartographic material]. [Maps, Maps--New York (State)--Brooklyn--1852, Maps--New York (State)--New York--1852, Maps--New York (State)--Williamsburg--1852]. C. Magnus, https://collections.library.yale.edu/catalog/15761127.