MLA

of Railroad Commissioners of the State of California, Board. Commissioners Official Railway Map of California : Completed to November 15th, 1889. Lith. H.S. Crocker & Co., 0AD. https://collections.library.yale.edu/catalog/15821543.

APA, 6th edition

of Railroad Commissioners of the State of California, B. (0 C.E.). Commissioners official railway map of California : completed to November 15th, 1889. [Maps]. Lith. H.S. Crocker & Co., https://collections.library.yale.edu/catalog/15821543.