MLA

Stenzel, Franz (1906-1998). Smith, Valentine, Louisville to John Edwards Smith care of V. Smith, Durham, New Hampshire. Box 54, folder 1047. 1838 May 28. https://collections.library.yale.edu/catalog/17232936.

APA, 6th edition

Stenzel, Franz (1906-1998). (["Box 54, folder 1047"])(1838 May 28)[Smith, Valentine, Louisville to John Edwards Smith care of V. Smith, Durham, New Hampshire]. https://collections.library.yale.edu/catalog/17232936.