Cite

Map of the county of Berkshire, Massachusetts : based upon the trigonometrical survey of the state / the details from actual surveys under the direction of Henry F. Walling, supt. of the state map.

MLA

Walling, Henry Francis, 1825-1888. Map of the county of Berkshire, Massachusetts : based upon the trigonometrical survey of the state / the details from actual surveys under the direction of Henry F. Walling, supt. of the state map.. BRBL_00454. 1858. https://collections.library.yale.edu/catalog/15654563.

APA, 6th edition

Walling, Henry Francis, 1825-1888. (["BRBL_00454"])(1858)[Map of the county of Berkshire, Massachusetts : based upon the trigonometrical survey of the state / the details from actual surveys under the direction of Henry F. Walling, supt. of the state map.]. https://collections.library.yale.edu/catalog/15654563.