Cite

Dismounted--the fourth troopers moving the led horses

MLA

Frederick Remington, 1861-1909. Dismounted--the fourth troopers moving the led horses. undated. https://collections.library.yale.edu/catalog/2015912.

APA, 6th edition

Frederick Remington, 1861-1909. (undated)[Dismounted--the fourth troopers moving the led horses]. https://collections.library.yale.edu/catalog/2015912.