MLA

Emory, William H. (William Hemsley), 1811-1887. Correspondence. Box 13, folder 144. 1863 Jun. https://collections.library.yale.edu/catalog/16686613.

APA, 6th edition

Emory, William H. (William Hemsley), 1811-1887. (["Box 13, folder 144"])(1863 Jun)[Correspondence]. https://collections.library.yale.edu/catalog/16686613.