Album 2: Small (4"x 5 1/2") black leather album
MLA
Mitchell, Alfred, 1832-. Album 2: Small (4"x 5 1/2") black leather album. Box 36, folder 28. 1850-1910. https://collections.library.yale.edu/catalog/10015268.
APA, 6th edition
Mitchell, Alfred, 1832-. (["Box 36, folder 28"])(1850-1910)[Album 2: Small (4"x 5 1/2") black leather album]. https://collections.library.yale.edu/catalog/10015268.