MLA

Stenzel, Franz (1906-1998). Johnson, Eastman. Box 18, folder 387-389. 1863-87, n.d.. https://collections.library.yale.edu/catalog/17232939.

APA, 6th edition

Stenzel, Franz (1906-1998). (["Box 18, folder 387-389"])(1863-87, n.d.)[Johnson, Eastman]. https://collections.library.yale.edu/catalog/17232939.