Cite

United States. Army Signal Corps.

MLA

Stieglitz, Alfred, 1864-1946. United States. Army Signal Corps.. Box 50, folder 1187. 1917. https://collections.library.yale.edu/catalog/11820732.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 50, folder 1187"])(1917)[United States. Army Signal Corps.]. https://collections.library.yale.edu/catalog/11820732.