MLA

Frederick Remington, 1861-1909. Merry Christmas in a Sibley tepee. 1891. https://collections.library.yale.edu/catalog/2015905.

APA, 6th edition

Frederick Remington, 1861-1909. (1891)[Merry Christmas in a Sibley tepee]. https://collections.library.yale.edu/catalog/2015905.