MLA

Watkins, Carleton E., 1829-1916. Panorama from California and Powell Streets, San Francisco. Watkins 1. [1871-73]. https://collections.library.yale.edu/catalog/2057040.

APA, 6th edition

Watkins, Carleton E., 1829-1916. (["Watkins 1"])([1871-73])[Panorama from California and Powell Streets, San Francisco]. https://collections.library.yale.edu/catalog/2057040.