MLA

Company, Southern Pacific. San Francisco and Vicinity / Issued by the Southern Pacific. Southern Pacific Co., 0AD. https://collections.library.yale.edu/catalog/15818758.

APA, 6th edition

Company, S. P. (0 C.E.). San Francisco and vicinity / issued by the Southern Pacific. [Maps]. Southern Pacific Co., https://collections.library.yale.edu/catalog/15818758.