Cite

Map of the city of New-York and it's environs. From actual surveys under the direction of H.F. Walling.

MLA

Walling, Henry Francis, 1825-1888. Map of the city of New-York and it's environs. From actual surveys under the direction of H.F. Walling.. BRBL_00486. 1860. https://collections.library.yale.edu/catalog/15761138.

APA, 6th edition

Walling, Henry Francis, 1825-1888. (["BRBL_00486"])(1860)[Map of the city of New-York and it's environs. From actual surveys under the direction of H.F. Walling.]. https://collections.library.yale.edu/catalog/15761138.