Cite

"Guard House" Ft. Bliss, Tex. no. 21

MLA

Trenkle, Charles, Cpl. "Guard House" Ft. Bliss, Tex. no. 21. Folder 28. [1915 or 1916]. https://collections.library.yale.edu/catalog/2017156.

APA, 6th edition

Trenkle, Charles, Cpl. (["Folder 28"])([1915 or 1916])["Guard House" Ft. Bliss, Tex. no. 21]. https://collections.library.yale.edu/catalog/2017156.