[Map of Texas showing Frisco lines and connections].
MLA
[Map of Texas Showing Frisco Lines and Connections]. St. Louis-San Francisco Railway Company?, 191AD. https://collections.library.yale.edu/catalog/15827562.
APA, 6th edition
[Map of Texas showing Frisco lines and connections]. (191 C.E.). [Maps]. St. Louis-San Francisco Railway Company?, https://collections.library.yale.edu/catalog/15827562.