MLA

Weir, John F. (John Ferguson), 1841-1926. A negative and photographs of J. F. W., family members and unidentified. Box 4, folder 77. Circa 1860s-1920s, undated. https://collections.library.yale.edu/catalog/10021214.

APA, 6th edition

Weir, John F. (John Ferguson), 1841-1926. (["Box 4, folder 77"])(Circa 1860s-1920s, undated)[A negative and photographs of J. F. W., family members and unidentified]. https://collections.library.yale.edu/catalog/10021214.