MLA

Dept, Wyoming. State Highway. Wyoming Highway Map, 1939. Dept. of Commerce and Industry,, Wyoming State Highway Dept. : 0AD. https://collections.library.yale.edu/catalog/15818399.

APA, 6th edition

Dept, W. S. H. (0 C.E.). Wyoming highway map, 1939. [Maps]. Dept. of Commerce and Industry,, Wyoming State Highway Dept. : https://collections.library.yale.edu/catalog/15818399.