MLA

Sutro, Adolph, 1830-1898. Correspondence. Box 1 | Folder 1. 1865 Dec 12. https://collections.library.yale.edu/catalog/16705504.

APA, 6th edition

Sutro, Adolph, 1830-1898. (["Box 1 | Folder 1"])(1865 Dec 12)[Correspondence]. https://collections.library.yale.edu/catalog/16705504.