MLA

Great Fire in San Francisco : May 4th, 1850 : 400 Buildings Burned! : Loss $5,000,000! Pub. by W.B. Cooke & Co, Portsmouth Square, 0AD. https://collections.library.yale.edu/catalog/2015931.

APA, 6th edition

Great fire in San Francisco : May 4th, 1850 : 400 buildings burned! : loss $5,000,000! (0 C.E.). [Pictoral works, Pictorial works, Lithographs]. Pub. by W.B. Cooke & Co, Portsmouth Square. https://collections.library.yale.edu/catalog/2015931.