MLA

Norton, Eliot, and lawyer. Eliot Norton Letters Relating to the Norton-Harjes Ambulance Corps, and Related Documents. 1915. https://collections.library.yale.edu/catalog/17356985.

APA, 6th edition

Norton, E., & lawyer. (1915). Eliot Norton letters relating to the Norton-Harjes Ambulance Corps, and related documents [Correspondence, Typescripts]. https://collections.library.yale.edu/catalog/17356985.