Cite

Bell's Studios. Portraits (in Series I)

MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Bell's Studios. Portraits (in Series I). Box 7, folder 172. n.d.. https://collections.library.yale.edu/catalog/2018166.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 7, folder 172"])(n.d.)[Bell's Studios. Portraits (in Series I)]. https://collections.library.yale.edu/catalog/2018166.