Big Horn Basin, Wyoming : Burlington Route / P.S. Eustis, General Passenger Agent, Chicago.
MLA
Big Horn Basin, Wyoming : Burlington Route / P.S. Eustis, General Passenger Agent, Chicago. Chicago, Burlington & Quincy Railroad Company?, 1902. https://collections.library.yale.edu/catalog/2005016.
APA, 6th edition
Big Horn Basin, Wyoming : Burlington Route / P.S. Eustis, General Passenger Agent, Chicago. (1902). [Promotional materials.]. Chicago, Burlington & Quincy Railroad Company?, https://collections.library.yale.edu/catalog/2005016.