MLA

In the Yellowstone Valley. Published and copyrighted by P.O. Vickery, Hatch Lith. Co., 1888. https://collections.library.yale.edu/catalog/2016616.

APA, 6th edition

In the Yellowstone valley. (1888). [Pictorial works, Chromolithographs]. Published and copyrighted by P.O. Vickery, Hatch Lith. Co. https://collections.library.yale.edu/catalog/2016616.