Cite

Sunset at Ft. Bliss Tex. no. 25

MLA

Trenkle, Charles, Cpl. Sunset at Ft. Bliss Tex. no. 25. Folder 28. [1915 or 1916]. https://collections.library.yale.edu/catalog/2017157.

APA, 6th edition

Trenkle, Charles, Cpl. (["Folder 28"])([1915 or 1916])[Sunset at Ft. Bliss Tex. no. 25]. https://collections.library.yale.edu/catalog/2017157.