Cite

Map of Orange County, Vermont / from surveys under the direction of H.F. Walling ; engraved, printed, colored & mounted at H.F. Walling's map establishment.

MLA

Walling, Henry Francis, 1825-1888. Map of Orange County, Vermont / from surveys under the direction of H.F. Walling ; engraved, printed, colored & mounted at H.F. Walling's map establishment.. BRBL_00452. 1858, c1856.. https://collections.library.yale.edu/catalog/15827760.

APA, 6th edition

Walling, Henry Francis, 1825-1888. (["BRBL_00452"])(1858, c1856.)[Map of Orange County, Vermont / from surveys under the direction of H.F. Walling ; engraved, printed, colored & mounted at H.F. Walling's map establishment.]. https://collections.library.yale.edu/catalog/15827760.