MLA

Morse, Sidney E. (Sidney Edwards), 1794-1871. North American atlas. c1842-[45]. https://collections.library.yale.edu/catalog/11869642.

APA, 6th edition

Morse, Sidney E. (Sidney Edwards), 1794-1871. (c1842-[45])[North American atlas]. https://collections.library.yale.edu/catalog/11869642.