Cite

In the trenches at Pine Ridge--from a sketch taken on the spot

MLA

Frederick Remington, 1861-1909. In the trenches at Pine Ridge--from a sketch taken on the spot. 1891. https://collections.library.yale.edu/catalog/2016334.

APA, 6th edition

Frederick Remington, 1861-1909. (1891)[In the trenches at Pine Ridge--from a sketch taken on the spot]. https://collections.library.yale.edu/catalog/2016334.