MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Portraits. Box 3, folder 76. 1872, n.d.. https://collections.library.yale.edu/catalog/2018207.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 3, folder 76"])(1872, n.d.)[Portraits]. https://collections.library.yale.edu/catalog/2018207.