MLA

Glover, Edwin, and publisher cartographer. Big Bar -- Middle Fork. Lith. by Justh, Quirot & Co., 0AD. https://collections.library.yale.edu/catalog/2016433.

APA, 6th edition

Glover, E., & cartographer, publisher. (0 C.E.). Big Bar -- middle fork [Pictorial works, Lithographs, Pictorial lettersheets, Views]. Lith. by Justh, Quirot & Co. https://collections.library.yale.edu/catalog/2016433.