MLA

Flint, Joseph Marshall, 1872-1944. Correspondence, induction papers, photographs, journal, and other materials relating to the creation and organization of Mobile Hospital #39. Box 1. 1917-1919. https://collections.library.yale.edu/catalog/10014174.

APA, 6th edition

Flint, Joseph Marshall, 1872-1944. (["Box 1"])(1917-1919)[Correspondence, induction papers, photographs, journal, and other materials relating to the creation and organization of Mobile Hospital #39]. https://collections.library.yale.edu/catalog/10014174.