MLA

Walling, Henry Francis, 1825-1888, cartographer. Map of the city of Providence, Rhode Island / compiled from the most authentic sources by H.F. Walling, typographical engineer.. BRBL_00464. 1885. https://collections.library.yale.edu/catalog/15762664.

APA, 6th edition

Walling, Henry Francis, 1825-1888, cartographer. (["BRBL_00464"])(1885)[Map of the city of Providence, Rhode Island / compiled from the most authentic sources by H.F. Walling, typographical engineer.]. https://collections.library.yale.edu/catalog/15762664.