MLA

Hammond, C. S., and Company. The Clyde Steamship Co. Map of Florida : Showing Routes and Railroad Connections. C.S. Hammond & Co., 0AD. https://collections.library.yale.edu/catalog/15827516.

APA, 6th edition

Hammond, C. S., & C. (0 C.E.). The Clyde Steamship Co. map of Florida : showing routes and railroad connections. [Maps]. C.S. Hammond & Co., https://collections.library.yale.edu/catalog/15827516.