MLA

Company, H. M. Gousha. Metropolitan Map : San Francisco and Vicinity. H.M. Gousha, 0AD. https://collections.library.yale.edu/catalog/15821530.

APA, 6th edition

Company, H. M. G. (0 C.E.). Metropolitan map : San Francisco and vicinity. [Maps]. H.M. Gousha, https://collections.library.yale.edu/catalog/15821530.