Cite

Ely, William D. to Frances L. Apthorp

MLA

Ely, William Davis, 1815-1908. Ely, William D. to Frances L. Apthorp. Box 1, folder 2. 1845, undated. https://collections.library.yale.edu/catalog/32532098.

APA, 6th edition

Ely, William Davis, 1815-1908. (["Box 1, folder 2"])(1845, undated)[Ely, William D. to Frances L. Apthorp]. https://collections.library.yale.edu/catalog/32532098.